diff --git a/apps/common/embed/lib/util/LocalStorage.js b/apps/common/embed/lib/util/LocalStorage.js
new file mode 100644
index 000000000..be30d339c
--- /dev/null
+++ b/apps/common/embed/lib/util/LocalStorage.js
@@ -0,0 +1,137 @@
+/*
+ *
+ * (c) Copyright Ascensio System SIA 2010-2021
+ *
+ * This program is a free software product. You can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License (AGPL)
+ * version 3 as published by the Free Software Foundation. In accordance with
+ * Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
+ * that Ascensio System SIA expressly excludes the warranty of non-infringement
+ * of any third-party rights.
+ *
+ * This program is distributed WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For
+ * details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
+ *
+ * You can contact Ascensio System SIA at 20A-12 Ernesta Birznieka-Upisha
+ * street, Riga, Latvia, EU, LV-1050.
+ *
+ * The  interactive user interfaces in modified source and object code versions
+ * of the Program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU AGPL version 3.
+ *
+ * Pursuant to Section 7(b) of the License you must retain the original Product
+ * logo when distributing the program. Pursuant to Section 7(e) we decline to
+ * grant you any rights under trademark law for use of our trademarks.
+ *
+ * All the Product's GUI elements, including illustrations and icon sets, as
+ * well as technical writing content are licensed under the terms of the
+ * Creative Commons Attribution-ShareAlike 4.0 International. See the License
+ * terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
+ *
+*/
+
+!window.common && (window.common = {});
+
+common.localStorage = new (function() {
+    var _storeName, _filter;
+    var _store = {};
+
+    var ongetstore = function(data) {
+        if (data.type == 'localstorage') {
+            _store = data.keys;
+        }
+    };
+
+    Common.Gateway.on('internalcommand', ongetstore);
+
+    var _refresh = function() {
+        if (!_lsAllowed)
+            Common.Gateway.internalMessage('localstorage', {cmd:'get', keys:_filter});
+    };
+
+    var _save = function() {
+        if (!_lsAllowed)
+            Common.Gateway.internalMessage('localstorage', {cmd:'set', keys:_store});
+    };
+
+    var _setItem = function(name, value, just) {
+        if (_lsAllowed) {
+            try
+            {
+                localStorage.setItem(name, value);
+            }
+            catch (error){}
+
+        } else {
+            _store[name] = value;
+
+            if (just===true) {
+                Common.Gateway.internalMessage('localstorage', {
+                    cmd:'set',
+                    keys: {
+                        name: value
+                    }
+                });
+            }
+        }
+    };
+
+    var _setItemAsBool = function(name, value, just) {
+        _setItem(name, value ? 1 : 0, just);
+    };
+
+    var _getItem = function(name) {
+        if (_lsAllowed)
+            return localStorage.getItem(name);
+        else
+            return _store[name]===undefined ? null : _store[name];
+    };
+
+    var _getItemAsBool = function (name, defValue) {
+        var value = _getItem(name);
+        defValue = defValue || false;
+        return (value!==null) ? (parseInt(value) != 0) : defValue;
+    };
+
+    var _getItemExists = function (name) {
+        var value = _getItem(name);
+        return value !== null;
+    };
+
+    var _removeItem = function(name) {
+        if (_lsAllowed)
+            localStorage.removeItem(name);
+        else
+            delete _store[name];
+    };
+
+    try {
+        var _lsAllowed = !!window.localStorage;
+    } catch (e) {
+        _lsAllowed = false;
+    }
+
+    return {
+        getId: function() {
+            return _storeName;
+        },
+        setId: function(name) {
+            _storeName = name;
+        },
+        getItem: _getItem,
+        getBool: _getItemAsBool,
+        setBool: _setItemAsBool,
+        setItem: _setItem,
+        removeItem: _removeItem,
+        setKeysFilter: function(value) {
+            _filter = value;
+        },
+        getKeysFilter: function() {
+            return _filter;
+        },
+        itemExists: _getItemExists,
+        sync: _refresh,
+        save: _save
+    };
+})();
diff --git a/apps/common/embed/lib/util/utils.js b/apps/common/embed/lib/util/utils.js
index 0ad2ed91e..8676bb859 100644
--- a/apps/common/embed/lib/util/utils.js
+++ b/apps/common/embed/lib/util/utils.js
@@ -74,6 +74,16 @@
             },
             htmlEncode: function(value) {
                 return $('<div/>').text(value).html();
+            },
+
+            fillUserInfo: function(info, lang, defname, defid) {
+                var _user = info || {};
+                _user.anonymous = !_user.id;
+                !_user.id && (_user.id = defid);
+                _user.fullname = !_user.name ? defname : _user.name;
+                _user.group && (_user.fullname = (_user.group).toString() + AscCommon.UserInfoParser.getSeparator() + _user.fullname);
+                _user.guest = !_user.name;
+                return _user;
             }
         };
     })();
diff --git a/apps/common/main/lib/util/utils.js b/apps/common/main/lib/util/utils.js
index d9f186d37..7d41f09ff 100644
--- a/apps/common/main/lib/util/utils.js
+++ b/apps/common/main/lib/util/utils.js
@@ -741,9 +741,10 @@ Common.Utils.applyCustomizationPlugins = function(plugins) {
     });
 };
 
-Common.Utils.fillUserInfo = function(info, lang, defname) {
+Common.Utils.fillUserInfo = function(info, lang, defname, defid) {
     var _user = info || {};
-    !_user.id && (_user.id = ('uid-' + Date.now()));
+    _user.anonymous = !_user.id;
+    !_user.id && (_user.id = defid);
     _user.fullname = !_user.name ? defname : _user.name;
     _user.group && (_user.fullname = (_user.group).toString() + AscCommon.UserInfoParser.getSeparator() + _user.fullname);
     _user.guest = !_user.name;
diff --git a/apps/documenteditor/embed/index.html b/apps/documenteditor/embed/index.html
index 7a0b2fb5f..fe9d9a3a9 100644
--- a/apps/documenteditor/embed/index.html
+++ b/apps/documenteditor/embed/index.html
@@ -255,6 +255,7 @@
       <script type="text/javascript" src="../../common/locale.js"></script>
       <script type="text/javascript" src="../../common/Gateway.js"></script>
       <script type="text/javascript" src="../../common/Analytics.js"></script>
+      <script type="text/javascript" src="../../common/embed/lib/util/LocalStorage.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/util/utils.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/view/modals.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/controller/modals.js"></script>
diff --git a/apps/documenteditor/embed/index_loader.html b/apps/documenteditor/embed/index_loader.html
index 1d4885581..842ca9611 100644
--- a/apps/documenteditor/embed/index_loader.html
+++ b/apps/documenteditor/embed/index_loader.html
@@ -349,6 +349,7 @@
       <script type="text/javascript" src="../../common/locale.js"></script>
       <script type="text/javascript" src="../../common/Gateway.js"></script>
       <script type="text/javascript" src="../../common/Analytics.js"></script>
+      <script type="text/javascript" src="../../common/embed/lib/util/LocalStorage.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/util/utils.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/view/modals.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/controller/modals.js"></script>
diff --git a/apps/documenteditor/embed/js/ApplicationController.js b/apps/documenteditor/embed/js/ApplicationController.js
index 992531f0d..b51279b9e 100644
--- a/apps/documenteditor/embed/js/ApplicationController.js
+++ b/apps/documenteditor/embed/js/ApplicationController.js
@@ -59,6 +59,10 @@ DE.ApplicationController = new(function(){
         return;
     }
 
+    common.localStorage.setId('text');
+    common.localStorage.setKeysFilter('de-,asc.text');
+    common.localStorage.sync();
+
     // Handlers
     // -------------------------
 
@@ -92,7 +96,19 @@ DE.ApplicationController = new(function(){
             var _permissions = $.extend({}, docConfig.permissions),
                 docInfo = new Asc.asc_CDocInfo(),
                 _user = new Asc.asc_CUserInfo();
-            _user.put_Id(config.user && config.user.id ? config.user.id : ('uid-' + Date.now()));
+
+            var canRenameAnonymous = !((typeof (config.customization) == 'object') && (typeof (config.customization.anonymous) == 'object') && (config.customization.anonymous.request===false)),
+                guestName = (typeof (config.customization) == 'object') && (typeof (config.customization.anonymous) == 'object') &&
+                            (typeof (config.customization.anonymous.label) == 'string') && config.customization.anonymous.label.trim()!=='' ?
+                            common.utils.htmlEncode(config.customization.anonymous.label) : me.textGuest,
+                value = canRenameAnonymous ? common.localStorage.getItem("guest-username") : null,
+                user = common.utils.fillUserInfo(config.user, config.lang, value ? (value + ' (' + guestName + ')' ) : me.textAnonymous,
+                                                 common.localStorage.getItem("guest-id") || ('uid-' + Date.now()));
+            user.anonymous && common.localStorage.setItem("guest-id", user.id);
+
+            _user.put_Id(user.id);
+            _user.put_FullName(user.fullname);
+            _user.put_IsAnonymousUser(user.anonymous);
 
             docInfo.put_Id(docConfig.key);
             docInfo.put_Url(docConfig.url);
@@ -634,7 +650,10 @@ DE.ApplicationController = new(function(){
             if (api) api.asc_runAutostartMacroses();
     }
 
-    // Helpers
+    function onBeforeUnload () {
+        common.localStorage.save();
+    }
+        // Helpers
     // -------------------------
 
     function onDocumentResize() {
@@ -651,6 +670,7 @@ DE.ApplicationController = new(function(){
         $(window).resize(function(){
             onDocumentResize();
         });
+        window.onbeforeunload = onBeforeUnload;
 
         var ismodalshown = false;
         $(document.body).on('show.bs.modal', '.modal',
@@ -735,6 +755,8 @@ DE.ApplicationController = new(function(){
         textSubmit: 'Submit',
         textSubmited: '<b>Form submitted successfully</b><br>Click to close the tip.',
         errorSubmit: 'Submit failed.',
-        errorEditingDownloadas: 'An error occurred during the work with the document.<br>Use the \'Download as...\' option to save the file backup copy to your computer hard drive.'
+        errorEditingDownloadas: 'An error occurred during the work with the document.<br>Use the \'Download as...\' option to save the file backup copy to your computer hard drive.',
+        textGuest: 'Guest',
+        textAnonymous: 'Anonymous'
     }
 })();
\ No newline at end of file
diff --git a/apps/documenteditor/embed/locale/en.json b/apps/documenteditor/embed/locale/en.json
index f9b6baf64..b1eab25e5 100644
--- a/apps/documenteditor/embed/locale/en.json
+++ b/apps/documenteditor/embed/locale/en.json
@@ -29,6 +29,8 @@
   "DE.ApplicationController.unknownErrorText": "Unknown error.",
   "DE.ApplicationController.unsupportedBrowserErrorText": "Your browser is not supported.",
   "DE.ApplicationController.waitText": "Please, wait...",
+  "DE.ApplicationController.textGuest": "Guest",
+  "DE.ApplicationController.textAnonymous": "Anonymous",
   "DE.ApplicationView.txtDownload": "Download",
   "DE.ApplicationView.txtDownloadDocx": "Download as docx",
   "DE.ApplicationView.txtDownloadPdf": "Download as pdf",
diff --git a/apps/documenteditor/main/app/controller/Main.js b/apps/documenteditor/main/app/controller/Main.js
index 9ece5dbc1..ae3ba4a75 100644
--- a/apps/documenteditor/main/app/controller/Main.js
+++ b/apps/documenteditor/main/app/controller/Main.js
@@ -361,7 +361,10 @@ define([
                     Common.Utils.InternalSettings.set("save-guest-username", !!value);
                 }
                 this.editorConfig.user          =
-                this.appOptions.user            = Common.Utils.fillUserInfo(this.editorConfig.user, this.editorConfig.lang, value ? (value + ' (' + this.appOptions.guestName + ')' ) : this.textAnonymous);
+                this.appOptions.user            = Common.Utils.fillUserInfo(this.editorConfig.user, this.editorConfig.lang, value ? (value + ' (' + this.appOptions.guestName + ')' ) : this.textAnonymous,
+                                                                            Common.localStorage.getItem("guest-id") || ('uid-' + Date.now()));
+                this.appOptions.user.anonymous && Common.localStorage.setItem("guest-id", this.appOptions.user.id);
+
                 this.appOptions.isDesktopApp    = this.editorConfig.targetApp == 'desktop';
                 this.appOptions.canCreateNew    = this.editorConfig.canRequestCreateNew || !_.isEmpty(this.editorConfig.createUrl);
                 this.appOptions.canOpenRecent   = this.editorConfig.recent !== undefined && !this.appOptions.isDesktopApp;
@@ -434,6 +437,7 @@ define([
                     var _user = new Asc.asc_CUserInfo();
                     _user.put_Id(this.appOptions.user.id);
                     _user.put_FullName(this.appOptions.user.fullname);
+                    _user.put_IsAnonymousUser(!!this.appOptions.user.anonymous);
 
                     docInfo = new Asc.asc_CDocInfo();
                     docInfo.put_Id(data.doc.key);
diff --git a/apps/documenteditor/mobile/locale/en.json b/apps/documenteditor/mobile/locale/en.json
index 6bd1dfcf8..eb22ff811 100644
--- a/apps/documenteditor/mobile/locale/en.json
+++ b/apps/documenteditor/mobile/locale/en.json
@@ -26,6 +26,8 @@
       "List Paragraph": "List Paragraph",
       "footnote text": "Footnote Text"
     },
+    "textGuest": "Guest",
+    "textAnonymous": "Anonymous",
     "leavePageText": "You have unsaved changes in this document. Click 'Stay on this Page' to await the autosave of the document. Click 'Leave this Page' to discard all the unsaved changes.",
     "titleLicenseExp": "License expired",
     "warnLicenseExp": "Your license has expired. Please update your license and refresh the page.",
diff --git a/apps/documenteditor/mobile/src/controller/Main.jsx b/apps/documenteditor/mobile/src/controller/Main.jsx
index 67b4f8607..161971b67 100644
--- a/apps/documenteditor/mobile/src/controller/Main.jsx
+++ b/apps/documenteditor/mobile/src/controller/Main.jsx
@@ -74,12 +74,14 @@ class MainController extends Component {
             };
 
             const loadConfig = data => {
+                const _t = this._t;
+
                 EditorUIController.isSupportEditFeature();
                 console.log('load config');
 
                 this.editorConfig = Object.assign({}, this.editorConfig, data.config);
 
-                this.props.storeAppOptions.setConfigOptions(this.editorConfig);
+                this.props.storeAppOptions.setConfigOptions(this.editorConfig, _t);
 
                 this.editorConfig.lang && this.api.asc_setLocale(this.editorConfig.lang);
 
@@ -109,6 +111,7 @@ class MainController extends Component {
                     const _user = new Asc.asc_CUserInfo();
                     _user.put_Id(_userOptions.id);
                     _user.put_FullName(_userOptions.fullname);
+                    _user.put_IsAnonymousUser(_userOptions.anonymous);
 
                     docInfo = new Asc.asc_CDocInfo();
                     docInfo.put_Id(data.doc.key);
diff --git a/apps/documenteditor/mobile/src/store/appOptions.js b/apps/documenteditor/mobile/src/store/appOptions.js
index 15160ce54..d22f062ce 100644
--- a/apps/documenteditor/mobile/src/store/appOptions.js
+++ b/apps/documenteditor/mobile/src/store/appOptions.js
@@ -1,4 +1,5 @@
 import {makeObservable, action, observable} from 'mobx';
+import { LocalStorage } from '../../../../common/mobile/utils/LocalStorage';
 
 export class storeAppOptions {
     constructor() {
@@ -48,9 +49,19 @@ export class storeAppOptions {
     }
 
     config = {};
-    setConfigOptions (config) {
+    setConfigOptions (config, _t) {
         this.config = config;
-        this.user = Common.Utils.fillUserInfo(config.user, config.lang, "Local.User"/*me.textAnonymous*/);
+        this.customization = config.customization;
+        this.canRenameAnonymous = !((typeof (this.customization) == 'object') && (typeof (this.customization.anonymous) == 'object') && (this.customization.anonymous.request===false));
+        this.guestName = (typeof (this.customization) == 'object') && (typeof (this.customization.anonymous) == 'object') &&
+        (typeof (this.customization.anonymous.label) == 'string') && this.customization.anonymous.label.trim()!=='' ?
+            Common.Utils.String.htmlEncode(this.customization.anonymous.label) : _t.textGuest;
+
+        const value = this.canRenameAnonymous ? LocalStorage.getItem("guest-username") : null;
+        this.user = Common.Utils.fillUserInfo(config.user, config.lang, value ? (value + ' (' + this.guestName + ')' ) : _t.textAnonymous, LocalStorage.getItem("guest-id") || ('uid-' + Date.now()));
+        this.user.anonymous && LocalStorage.setItem("guest-id", this.user.id);
+
+        config.user = this.user;
         this.isDesktopApp = config.targetApp == 'desktop';
         this.canCreateNew = !!config.createUrl && !this.isDesktopApp;
         this.canOpenRecent = config.recent !== undefined && !this.isDesktopApp;
@@ -64,7 +75,6 @@ export class storeAppOptions {
         this.mergeFolderUrl = config.mergeFolderUrl;
         this.canAnalytics = false;
         this.canRequestClose = config.canRequestClose;
-        this.customization = config.customization;
         this.canBackToFolder = (config.canBackToFolder!==false) && (typeof (config.customization) == 'object') && (typeof (config.customization.goback) == 'object')
             && (!!(config.customization.goback.url) || config.customization.goback.requestClose && this.canRequestClose);
         this.canBack = this.canBackToFolder === true;
diff --git a/apps/presentationeditor/embed/index.html b/apps/presentationeditor/embed/index.html
index 0f58d02a3..b0baf0920 100644
--- a/apps/presentationeditor/embed/index.html
+++ b/apps/presentationeditor/embed/index.html
@@ -305,6 +305,7 @@
       <script type="text/javascript" src="../../common/locale.js"></script>
       <script type="text/javascript" src="../../common/Gateway.js"></script>
       <script type="text/javascript" src="../../common/Analytics.js"></script>
+      <script type="text/javascript" src="../../common/embed/lib/util/LocalStorage.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/util/utils.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/view/modals.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/controller/modals.js"></script>
diff --git a/apps/presentationeditor/embed/index_loader.html b/apps/presentationeditor/embed/index_loader.html
index 0d98ea98c..5d725ac73 100644
--- a/apps/presentationeditor/embed/index_loader.html
+++ b/apps/presentationeditor/embed/index_loader.html
@@ -347,6 +347,7 @@
       <script type="text/javascript" src="../../common/locale.js"></script>
       <script type="text/javascript" src="../../common/Gateway.js"></script>
       <script type="text/javascript" src="../../common/Analytics.js"></script>
+      <script type="text/javascript" src="../../common/embed/lib/util/LocalStorage.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/util/utils.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/view/modals.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/controller/modals.js"></script>
diff --git a/apps/presentationeditor/embed/js/ApplicationController.js b/apps/presentationeditor/embed/js/ApplicationController.js
index 8982ccd8b..6f4ca8d87 100644
--- a/apps/presentationeditor/embed/js/ApplicationController.js
+++ b/apps/presentationeditor/embed/js/ApplicationController.js
@@ -57,6 +57,10 @@ PE.ApplicationController = new(function(){
         return;
     }
 
+    common.localStorage.setId('text');
+    common.localStorage.setKeysFilter('pe-,asc.presentation');
+    common.localStorage.sync();
+
     // Handlers
     // -------------------------
 
@@ -90,7 +94,19 @@ PE.ApplicationController = new(function(){
             var _permissions = $.extend({}, docConfig.permissions),
                 docInfo = new Asc.asc_CDocInfo(),
                 _user = new Asc.asc_CUserInfo();
-            _user.put_Id(config.user && config.user.id ? config.user.id : ('uid-' + Date.now()));
+
+            var canRenameAnonymous = !((typeof (config.customization) == 'object') && (typeof (config.customization.anonymous) == 'object') && (config.customization.anonymous.request===false)),
+                guestName = (typeof (config.customization) == 'object') && (typeof (config.customization.anonymous) == 'object') &&
+                (typeof (config.customization.anonymous.label) == 'string') && config.customization.anonymous.label.trim()!=='' ?
+                    common.utils.htmlEncode(config.customization.anonymous.label) : me.textGuest,
+                value = canRenameAnonymous ? common.localStorage.getItem("guest-username") : null,
+                user = common.utils.fillUserInfo(config.user, config.lang, value ? (value + ' (' + guestName + ')' ) : me.textAnonymous,
+                    common.localStorage.getItem("guest-id") || ('uid-' + Date.now()));
+            user.anonymous && common.localStorage.setItem("guest-id", user.id);
+
+            _user.put_Id(user.id);
+            _user.put_FullName(user.fullname);
+            _user.put_IsAnonymousUser(user.anonymous);
 
             docInfo.put_Id(docConfig.key);
             docInfo.put_Url(docConfig.url);
@@ -625,6 +641,9 @@ PE.ApplicationController = new(function(){
             if (api) api.asc_runAutostartMacroses();
     }
 
+    function onBeforeUnload () {
+        common.localStorage.save();
+    }
     // Helpers
     // -------------------------
 
@@ -646,7 +665,8 @@ PE.ApplicationController = new(function(){
         $(window).resize(function(){
             onDocumentResize();
         });
-
+        window.onbeforeunload = onBeforeUnload;
+        
         api = new Asc.asc_docs_api({
             'id-view'  : 'editor_sdk',
             'embedded' : true
@@ -691,6 +711,8 @@ PE.ApplicationController = new(function(){
         textLoadingDocument: 'Loading presentation',
         txtClose: 'Close',
         errorFileSizeExceed: 'The file size exceeds the limitation set for your server.<br>Please contact your Document Server administrator for details.',
-        errorUpdateVersionOnDisconnect: 'Internet connection has been restored, and the file version has been changed.<br>Before you can continue working, you need to download the file or copy its content to make sure nothing is lost, and then reload this page.'
+        errorUpdateVersionOnDisconnect: 'Internet connection has been restored, and the file version has been changed.<br>Before you can continue working, you need to download the file or copy its content to make sure nothing is lost, and then reload this page.',
+        textGuest: 'Guest',
+        textAnonymous: 'Anonymous'
     }
 })();
diff --git a/apps/presentationeditor/embed/locale/en.json b/apps/presentationeditor/embed/locale/en.json
index 8c5855861..3e45dc89b 100644
--- a/apps/presentationeditor/embed/locale/en.json
+++ b/apps/presentationeditor/embed/locale/en.json
@@ -23,6 +23,8 @@
   "PE.ApplicationController.unknownErrorText": "Unknown error.",
   "PE.ApplicationController.unsupportedBrowserErrorText": "Your browser is not supported.",
   "PE.ApplicationController.waitText": "Please, wait...",
+  "PE.ApplicationController.textGuest": "Guest",
+  "PE.ApplicationController.textAnonymous": "Anonymous",
   "PE.ApplicationView.txtDownload": "Download",
   "PE.ApplicationView.txtEmbed": "Embed",
   "PE.ApplicationView.txtFileLocation": "Open file location",
diff --git a/apps/presentationeditor/main/app/controller/Main.js b/apps/presentationeditor/main/app/controller/Main.js
index 3988c9b9d..6326bf485 100644
--- a/apps/presentationeditor/main/app/controller/Main.js
+++ b/apps/presentationeditor/main/app/controller/Main.js
@@ -322,7 +322,10 @@ define([
                     Common.Utils.InternalSettings.set("save-guest-username", !!value);
                 }
                 this.editorConfig.user          =
-                this.appOptions.user            = Common.Utils.fillUserInfo(data.config.user, this.editorConfig.lang, value ? (value + ' (' + this.appOptions.guestName + ')' ) : this.textAnonymous);
+                this.appOptions.user            = Common.Utils.fillUserInfo(data.config.user, this.editorConfig.lang, value ? (value + ' (' + this.appOptions.guestName + ')' ) : this.textAnonymous,
+                                                  Common.localStorage.getItem("guest-id") || ('uid-' + Date.now()));
+                this.appOptions.user.anonymous && Common.localStorage.setItem("guest-id", this.appOptions.user.id);
+
                 this.appOptions.isDesktopApp    = this.editorConfig.targetApp == 'desktop';
                 this.appOptions.canCreateNew    = this.editorConfig.canRequestCreateNew || !_.isEmpty(this.editorConfig.createUrl);
                 this.appOptions.canOpenRecent   = this.editorConfig.recent !== undefined && !this.appOptions.isDesktopApp;
@@ -393,6 +396,7 @@ define([
                     var _user = new Asc.asc_CUserInfo();
                     _user.put_Id(this.appOptions.user.id);
                     _user.put_FullName(this.appOptions.user.fullname);
+                    _user.put_IsAnonymousUser(!!this.appOptions.user.anonymous);
 
                     docInfo = new Asc.asc_CDocInfo();
                     docInfo.put_Id(data.doc.key);
diff --git a/apps/presentationeditor/mobile/locale/en.json b/apps/presentationeditor/mobile/locale/en.json
index 768aafced..c83fb611a 100644
--- a/apps/presentationeditor/mobile/locale/en.json
+++ b/apps/presentationeditor/mobile/locale/en.json
@@ -22,6 +22,8 @@
         "Table": "Table",
         "Slide title": "Slide title"
       },
+      "textGuest": "Guest",
+      "textAnonymous": "Anonymous",
       "closeButtonText": "Close File",
       "advDRMOptions": "Protected File",
       "advDRMPassword": "Password",
diff --git a/apps/presentationeditor/mobile/src/controller/Main.jsx b/apps/presentationeditor/mobile/src/controller/Main.jsx
index f7aa2b066..e34fed388 100644
--- a/apps/presentationeditor/mobile/src/controller/Main.jsx
+++ b/apps/presentationeditor/mobile/src/controller/Main.jsx
@@ -70,13 +70,15 @@ class MainController extends Component {
             };
 
             const loadConfig = data => {
+                const _t = this._t;
+
                 EditorUIController.isSupportEditFeature();
 
                 console.log('load config');
 
                 this.editorConfig = Object.assign({}, this.editorConfig, data.config);
 
-                this.props.storeAppOptions.setConfigOptions(this.editorConfig);
+                this.props.storeAppOptions.setConfigOptions(this.editorConfig, _t);
 
                 this.editorConfig.lang && this.api.asc_setLocale(this.editorConfig.lang);
 
@@ -104,6 +106,7 @@ class MainController extends Component {
                     const _userOptions = this.props.storeAppOptions.user;
                     _user.put_Id(_userOptions.id);
                     _user.put_FullName(_userOptions.fullname);
+                    _user.put_IsAnonymousUser(_userOptions.anonymous);
 
                     docInfo = new Asc.asc_CDocInfo();
                     docInfo.put_Id(data.doc.key);
diff --git a/apps/presentationeditor/mobile/src/store/appOptions.js b/apps/presentationeditor/mobile/src/store/appOptions.js
index ce71648ec..0cb3fc7cd 100644
--- a/apps/presentationeditor/mobile/src/store/appOptions.js
+++ b/apps/presentationeditor/mobile/src/store/appOptions.js
@@ -1,4 +1,5 @@
 import {action, observable, makeObservable} from 'mobx';
+import { LocalStorage } from '../../../../common/mobile/utils/LocalStorage';
 
 export class storeAppOptions {
     constructor() {
@@ -30,9 +31,19 @@ export class storeAppOptions {
         this.isDocReady = value;
     }
 
-    setConfigOptions (config) {
+    setConfigOptions (config, _t) {
         this.config = config;
-        this.user = Common.Utils.fillUserInfo(config.user, config.lang, "Local.User"/*me.textAnonymous*/);
+        this.customization = config.customization;
+        this.canRenameAnonymous = !((typeof (this.customization) == 'object') && (typeof (this.customization.anonymous) == 'object') && (this.customization.anonymous.request===false));
+        this.guestName = (typeof (this.customization) == 'object') && (typeof (this.customization.anonymous) == 'object') &&
+        (typeof (this.customization.anonymous.label) == 'string') && this.customization.anonymous.label.trim()!=='' ?
+            Common.Utils.String.htmlEncode(this.customization.anonymous.label) : _t.textGuest;
+
+        const value = this.canRenameAnonymous ? LocalStorage.getItem("guest-username") : null;
+        this.user = Common.Utils.fillUserInfo(config.user, config.lang, value ? (value + ' (' + this.guestName + ')' ) : _t.textAnonymous, LocalStorage.getItem("guest-id") || ('uid-' + Date.now()));
+        this.user.anonymous && LocalStorage.setItem("guest-id", this.user.id);
+
+        config.user = this.user;
         this.isDesktopApp = config.targetApp == 'desktop';
         this.canCreateNew = !!config.createUrl && !this.isDesktopApp;
         this.canOpenRecent = config.recent !== undefined && !this.isDesktopApp;
@@ -46,7 +57,6 @@ export class storeAppOptions {
         this.mergeFolderUrl = config.mergeFolderUrl;
         this.canAnalytics = false;
         this.canRequestClose = config.canRequestClose;
-        this.customization = config.customization;
         this.canBackToFolder = (config.canBackToFolder!==false) && (typeof (config.customization) == 'object') && (typeof (config.customization.goback) == 'object')
             && (!!(config.customization.goback.url) || config.customization.goback.requestClose && this.canRequestClose);
         this.canBack = this.canBackToFolder === true;
diff --git a/apps/spreadsheeteditor/embed/index.html b/apps/spreadsheeteditor/embed/index.html
index 2ba2a765a..a7eb4880a 100644
--- a/apps/spreadsheeteditor/embed/index.html
+++ b/apps/spreadsheeteditor/embed/index.html
@@ -281,6 +281,7 @@
       <script type="text/javascript" src="../../common/locale.js"></script>
       <script type="text/javascript" src="../../common/Gateway.js"></script>
       <script type="text/javascript" src="../../common/Analytics.js"></script>
+      <script type="text/javascript" src="../../common/embed/lib/util/LocalStorage.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/util/utils.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/view/modals.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/controller/modals.js"></script>
diff --git a/apps/spreadsheeteditor/embed/index_loader.html b/apps/spreadsheeteditor/embed/index_loader.html
index 3d44aeda2..f703fe302 100644
--- a/apps/spreadsheeteditor/embed/index_loader.html
+++ b/apps/spreadsheeteditor/embed/index_loader.html
@@ -349,6 +349,7 @@
       <script type="text/javascript" src="../../common/locale.js"></script>
       <script type="text/javascript" src="../../common/Gateway.js"></script>
       <script type="text/javascript" src="../../common/Analytics.js"></script>
+      <script type="text/javascript" src="../../common/embed/lib/util/LocalStorage.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/util/utils.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/view/modals.js"></script>
       <script type="text/javascript" src="../../common/embed/lib/controller/modals.js"></script>
diff --git a/apps/spreadsheeteditor/embed/js/ApplicationController.js b/apps/spreadsheeteditor/embed/js/ApplicationController.js
index 8ad14a075..e2a5a7031 100644
--- a/apps/spreadsheeteditor/embed/js/ApplicationController.js
+++ b/apps/spreadsheeteditor/embed/js/ApplicationController.js
@@ -59,6 +59,9 @@ SSE.ApplicationController = new(function(){
         return;
     }
 
+    common.localStorage.setId('text');
+    common.localStorage.setKeysFilter('sse-,asc.table');
+    common.localStorage.sync();
 
     // Handlers
     // -------------------------
@@ -93,7 +96,19 @@ SSE.ApplicationController = new(function(){
             var _permissions = $.extend({}, docConfig.permissions),
                 docInfo = new Asc.asc_CDocInfo(),
                 _user = new Asc.asc_CUserInfo();
-            _user.put_Id(config.user && config.user.id ? config.user.id : ('uid-' + Date.now()));
+
+            var canRenameAnonymous = !((typeof (config.customization) == 'object') && (typeof (config.customization.anonymous) == 'object') && (config.customization.anonymous.request===false)),
+                guestName = (typeof (config.customization) == 'object') && (typeof (config.customization.anonymous) == 'object') &&
+                (typeof (config.customization.anonymous.label) == 'string') && config.customization.anonymous.label.trim()!=='' ?
+                    common.utils.htmlEncode(config.customization.anonymous.label) : me.textGuest,
+                value = canRenameAnonymous ? common.localStorage.getItem("guest-username") : null,
+                user = common.utils.fillUserInfo(config.user, config.lang, value ? (value + ' (' + guestName + ')' ) : me.textAnonymous,
+                    common.localStorage.getItem("guest-id") || ('uid-' + Date.now()));
+            user.anonymous && common.localStorage.setItem("guest-id", user.id);
+
+            _user.put_Id(user.id);
+            _user.put_FullName(user.fullname);
+            _user.put_IsAnonymousUser(user.anonymous);
 
             docInfo.put_Id(docConfig.key);
             docInfo.put_Url(docConfig.url);
@@ -580,6 +595,9 @@ SSE.ApplicationController = new(function(){
             if (api) api.asc_runAutostartMacroses();
     }
 
+    function onBeforeUnload () {
+        common.localStorage.save();
+    }
     // Helpers
     // -------------------------
 
@@ -599,7 +617,8 @@ SSE.ApplicationController = new(function(){
         $(window).resize(function(){
             onDocumentResize();
         });
-
+        window.onbeforeunload = onBeforeUnload;
+        
         api = new Asc.spreadsheet_api({
             'id-view': 'editor_sdk',
             'embedded' : true
@@ -643,6 +662,8 @@ SSE.ApplicationController = new(function(){
         textLoadingDocument: 'Loading spreadsheet',
         txtClose: 'Close',
         errorFileSizeExceed: 'The file size exceeds the limitation set for your server.<br>Please contact your Document Server administrator for details.',
-        errorUpdateVersionOnDisconnect: 'Internet connection has been restored, and the file version has been changed.<br>Before you can continue working, you need to download the file or copy its content to make sure nothing is lost, and then reload this page.'
+        errorUpdateVersionOnDisconnect: 'Internet connection has been restored, and the file version has been changed.<br>Before you can continue working, you need to download the file or copy its content to make sure nothing is lost, and then reload this page.',
+        textGuest: 'Guest',
+        textAnonymous: 'Anonymous'
     }
 })();
\ No newline at end of file
diff --git a/apps/spreadsheeteditor/embed/locale/en.json b/apps/spreadsheeteditor/embed/locale/en.json
index 101004ce6..1d6011fcc 100644
--- a/apps/spreadsheeteditor/embed/locale/en.json
+++ b/apps/spreadsheeteditor/embed/locale/en.json
@@ -23,6 +23,8 @@
   "SSE.ApplicationController.unknownErrorText": "Unknown error.",
   "SSE.ApplicationController.unsupportedBrowserErrorText": "Your browser is not supported.",
   "SSE.ApplicationController.waitText": "Please, wait...",
+  "SSE.ApplicationController.textGuest": "Guest",
+  "SSE.ApplicationController.textAnonymous": "Anonymous",
   "SSE.ApplicationView.txtDownload": "Download",
   "SSE.ApplicationView.txtEmbed": "Embed",
   "SSE.ApplicationView.txtFileLocation": "Open file location",
diff --git a/apps/spreadsheeteditor/main/app/controller/Main.js b/apps/spreadsheeteditor/main/app/controller/Main.js
index 9f861a970..0fdda3bfa 100644
--- a/apps/spreadsheeteditor/main/app/controller/Main.js
+++ b/apps/spreadsheeteditor/main/app/controller/Main.js
@@ -356,7 +356,10 @@ define([
                     Common.Utils.InternalSettings.set("save-guest-username", !!value);
                 }
                 this.editorConfig.user          =
-                this.appOptions.user            = Common.Utils.fillUserInfo(this.editorConfig.user, this.editorConfig.lang, value ? (value + ' (' + this.appOptions.guestName + ')' ) : this.textAnonymous);
+                this.appOptions.user            = Common.Utils.fillUserInfo(this.editorConfig.user, this.editorConfig.lang, value ? (value + ' (' + this.appOptions.guestName + ')' ) : this.textAnonymous,
+                                                  Common.localStorage.getItem("guest-id") || ('uid-' + Date.now()));
+                this.appOptions.user.anonymous && Common.localStorage.setItem("guest-id", this.appOptions.user.id);
+
                 this.appOptions.isDesktopApp    = this.editorConfig.targetApp == 'desktop';
                 this.appOptions.canCreateNew    = this.editorConfig.canRequestCreateNew || !_.isEmpty(this.editorConfig.createUrl);
                 this.appOptions.canOpenRecent   = this.editorConfig.recent !== undefined && !this.appOptions.isDesktopApp;
@@ -458,6 +461,7 @@ define([
                     var _user = new Asc.asc_CUserInfo();
                     _user.put_Id(this.appOptions.user.id);
                     _user.put_FullName(this.appOptions.user.fullname);
+                    _user.put_IsAnonymousUser(!!this.appOptions.user.anonymous);
 
                     docInfo = new Asc.asc_CDocInfo();
                     docInfo.put_Id(data.doc.key);
diff --git a/apps/spreadsheeteditor/mobile/src/controller/Main.jsx b/apps/spreadsheeteditor/mobile/src/controller/Main.jsx
index 92889cf34..466c4b7be 100644
--- a/apps/spreadsheeteditor/mobile/src/controller/Main.jsx
+++ b/apps/spreadsheeteditor/mobile/src/controller/Main.jsx
@@ -143,6 +143,7 @@ class MainController extends Component {
                       
                     _user.put_Id(_userOptions.id);
                     _user.put_FullName(_userOptions.fullname);
+                    _user.put_IsAnonymousUser(_userOptions.anonymous);
 
                     docInfo = new Asc.asc_CDocInfo();
                     docInfo.put_Id(data.doc.key);
diff --git a/apps/spreadsheeteditor/mobile/src/store/appOptions.js b/apps/spreadsheeteditor/mobile/src/store/appOptions.js
index 24c605a10..33d830d27 100644
--- a/apps/spreadsheeteditor/mobile/src/store/appOptions.js
+++ b/apps/spreadsheeteditor/mobile/src/store/appOptions.js
@@ -1,4 +1,5 @@
 import {action, observable, makeObservable} from 'mobx';
+import { LocalStorage } from '../../../../common/mobile/utils/LocalStorage';
 
 export class storeAppOptions {
     constructor() {
@@ -38,9 +39,10 @@ export class storeAppOptions {
         (typeof (this.customization.anonymous.label) == 'string') && this.customization.anonymous.label.trim()!=='' ?
             Common.Utils.String.htmlEncode(this.customization.anonymous.label) : _t.textGuest;
 
-        const value = this.canRenameAnonymous ? Common.localStorage.getItem("guest-username") : null;
-        this.user = Common.Utils.fillUserInfo(config.user, config.lang, value ? (value + ' (' + this.guestName + ')' ) : _t.textAnonymous);
-
+        const value = this.canRenameAnonymous ? LocalStorage.getItem("guest-username") : null;
+        this.user = Common.Utils.fillUserInfo(config.user, config.lang, value ? (value + ' (' + this.guestName + ')' ) : _t.textAnonymous, LocalStorage.getItem("guest-id") || ('uid-' + Date.now()));
+        this.user.anonymous && LocalStorage.setItem("guest-id", this.user.id);
+        
         config.user = this.user;
         this.isDesktopApp = config.targetApp == 'desktop';
         this.canCreateNew = !!config.createUrl && !this.isDesktopApp;
@@ -58,7 +60,6 @@ export class storeAppOptions {
         this.mergeFolderUrl = config.mergeFolderUrl;
         this.canAnalytics = false;
         this.canRequestClose = config.canRequestClose;
-        this.customization = config.customization;
         this.canBackToFolder = (config.canBackToFolder!==false) && (typeof (config.customization) == 'object') && (typeof (config.customization.goback) == 'object')
             && (!!(config.customization.goback.url) || config.customization.goback.requestClose && this.canRequestClose);
         this.canBack = this.canBackToFolder === true;
diff --git a/build/documenteditor.json b/build/documenteditor.json
index a08360a2a..a1d168912 100644
--- a/build/documenteditor.json
+++ b/build/documenteditor.json
@@ -409,6 +409,7 @@
                 "../apps/common/locale.js",
                 "../apps/common/Gateway.js",
                 "../apps/common/Analytics.js",
+                "../apps/common/embed/lib/util/LocalStorage.js",
                 "../apps/common/embed/lib/util/utils.js",
                 "../apps/common/embed/lib/view/modals.js",
                 "../apps/common/embed/lib/controller/modals.js",
diff --git a/build/presentationeditor.json b/build/presentationeditor.json
index fd01f1441..f5954e7f7 100644
--- a/build/presentationeditor.json
+++ b/build/presentationeditor.json
@@ -413,6 +413,7 @@
                 "../apps/common/locale.js",
                 "../apps/common/Gateway.js",
                 "../apps/common/Analytics.js",
+                "../apps/common/embed/lib/util/LocalStorage.js",
                 "../apps/common/embed/lib/util/utils.js",
                 "../apps/common/embed/lib/view/modals.js",
                 "../apps/common/embed/lib/controller/modals.js",
diff --git a/build/spreadsheeteditor.json b/build/spreadsheeteditor.json
index bf9b7ca17..d4270756a 100644
--- a/build/spreadsheeteditor.json
+++ b/build/spreadsheeteditor.json
@@ -426,6 +426,7 @@
                 "../apps/common/locale.js",
                 "../apps/common/Gateway.js",
                 "../apps/common/Analytics.js",
+                "../apps/common/embed/lib/util/LocalStorage.js",
                 "../apps/common/embed/lib/util/utils.js",
                 "../apps/common/embed/lib/view/modals.js",
                 "../apps/common/embed/lib/controller/modals.js",