diff --git a/apps/common/main/lib/controller/Desktop.js b/apps/common/main/lib/controller/Desktop.js
index a064822b7..43e510ce1 100644
--- a/apps/common/main/lib/controller/Desktop.js
+++ b/apps/common/main/lib/controller/Desktop.js
@@ -62,7 +62,8 @@ define([
             'btn-save-coauth': 'coauth',
             'btn-synch': 'synch' };
 
-        var nativevars;
+        var nativevars,
+            helpUrl;
 
         if ( !!native ) {
             native.features = native.features || {};
@@ -236,6 +237,45 @@ define([
             }
         }
 
+        const _checkHelpAvailable = function () {
+            const curr_lang = Common.Locale.getCurrentLanguage();
+            let url = 'resources/help/' + curr_lang;
+            fetch(url + '/Contents.json').then(function (response) {
+                if ( response.ok ) {
+                    /* local help avail */
+                    helpUrl = url;
+                } else
+                if ( curr_lang != Common.Locale.getDefaultLanguage() ) {
+                    url = 'resources/help/' + Common.Locale.getDefaultLanguage();
+                    fetch(url + '/Contents.json').then(function (response){
+                        if ( response.ok ) {
+                            /* local help avail. def lang */
+                            helpUrl = url;
+                        } else
+                        if ( this.helpUrl() ) {
+                            url = this.helpUrl() + curr_lang;
+                            fetch(url + '/Contents.json').then(function (response){
+                                if ( response.ok ) {
+                                    /* remote help avail */
+                                    helpUrl = url;
+                                } else {
+                                    url = this.helpUrl() + Common.getDefaultLanguage();
+                                    fetch(url + '/Contents.json').then(function (response){
+                                        if ( response.ok ) {
+                                            /* remote help avail. def lang */
+                                            helpUrl = url;
+                                        } else {
+                                            /* no help avail. open help center */
+                                        }
+                                    });
+                                }
+                            });
+                        }
+                    });
+                }
+            });
+        }
+
         return {
             init: function (opts) {
                 _.extend(config, opts);
@@ -281,6 +321,8 @@ define([
                                     this.close();
                                 }).show();
                             }
+
+                            _checkHelpAvailable();
                         }
                     });
 
@@ -450,6 +492,9 @@ define([
                 }
             },
             helpUrl: function () {
+                if ( helpUrl )
+                    return helpUrl;
+
                 if ( !!nativevars && nativevars.helpUrl ) {
                     var webapp = window.SSE ? 'spreadsheeteditor' :
                                     window.PE ? 'presentationeditor' : 'documenteditor';
@@ -458,6 +503,9 @@ define([
 
                 return undefined;
             },
+            helpAvailable: function () {
+                return !!helpUrl;
+            },
             getDefaultPrinterName: function () {
                 return nativevars ? nativevars.defaultPrinterName : '';
             },
diff --git a/apps/spreadsheeteditor/main/app/controller/Main.js b/apps/spreadsheeteditor/main/app/controller/Main.js
index 946af7870..42d6165d5 100644
--- a/apps/spreadsheeteditor/main/app/controller/Main.js
+++ b/apps/spreadsheeteditor/main/app/controller/Main.js
@@ -197,6 +197,14 @@ define([
                 Common.Utils.InternalSettings.set("sse-settings-fontrender", value);
                 this.api.asc_setFontRenderingMode(parseInt(value));
 
+                if ( !Common.Utils.isIE ) {
+                    if ( /^https?:\/\//.test('{{HELP_CENTER_WEB_SSE}}') ) {
+                        const _url_obj = new URL('{{HELP_CENTER_WEB_SSE}}');
+                        _url_obj.searchParams.set('lang', Common.Locale.getCurrentLanguage());
+                        Common.Utils.InternalSettings.set("url-help-center", _url_obj.toString());
+                    }
+                }
+
                 this.api.asc_registerCallback('asc_onOpenDocumentProgress',  _.bind(this.onOpenDocument, this));
                 this.api.asc_registerCallback('asc_onEndAction',             _.bind(this.onLongActionEnd, this));
                 this.api.asc_registerCallback('asc_onError',                 _.bind(this.onError, this));
diff --git a/apps/spreadsheeteditor/main/app/view/FileMenu.js b/apps/spreadsheeteditor/main/app/view/FileMenu.js
index 84b635217..22a2e0c6e 100644
--- a/apps/spreadsheeteditor/main/app/view/FileMenu.js
+++ b/apps/spreadsheeteditor/main/app/view/FileMenu.js
@@ -59,7 +59,8 @@ define([
                         if (item.options.action === 'help') {
                             if ( panel.noHelpContents === true && navigator.onLine ) {
                                 this.fireEvent('item:click', [this, 'external-help', true]);
-                                !!panel.urlHelpCenter && window.open(panel.urlHelpCenter, '_blank');
+                                const helpCenter = Common.Utils.InternalSettings.get('url-help-center');
+                                !!helpCenter && window.open(helpCenter, '_blank');
                                 return;
                             }
                         }
diff --git a/apps/spreadsheeteditor/main/app/view/FileMenuPanels.js b/apps/spreadsheeteditor/main/app/view/FileMenuPanels.js
index 76c2ca4b6..f855086e5 100644
--- a/apps/spreadsheeteditor/main/app/view/FileMenuPanels.js
+++ b/apps/spreadsheeteditor/main/app/view/FileMenuPanels.js
@@ -1923,14 +1923,6 @@ SSE.Views.FileMenuPanels.RecentFiles = Common.UI.BaseView.extend({
             this.urlPref = 'resources/help/{{DEFAULT_LANG}}/';
             this.openUrl = null;
 
-            if ( !Common.Utils.isIE ) {
-                if ( /^https?:\/\//.test('{{HELP_CENTER_WEB_SSE}}') ) {
-                    const _url_obj = new URL('{{HELP_CENTER_WEB_SSE}}');
-                    _url_obj.searchParams.set('lang', Common.Locale.getCurrentLanguage());
-                    this.urlHelpCenter = _url_obj.toString();
-                }
-            }
-
             this.en_data = [
                 {"src": "ProgramInterface/ProgramInterface.htm", "name": "Introducing Spreadsheet Editor user interface", "headername": "Program Interface"},
                 {"src": "ProgramInterface/FileTab.htm", "name": "File tab"},
diff --git a/apps/spreadsheeteditor/main/app/view/FormulaWizard.js b/apps/spreadsheeteditor/main/app/view/FormulaWizard.js
index 2bcb0f506..617c49802 100644
--- a/apps/spreadsheeteditor/main/app/view/FormulaWizard.js
+++ b/apps/spreadsheeteditor/main/app/view/FormulaWizard.js
@@ -456,24 +456,43 @@ define([
                     lang = (this.lang) ? this.lang.split(/[\-\_]/)[0] : 'en';
 
                 var me = this,
-                    name = '/Functions/' + this.funcprops.origin.toLocaleLowerCase().replace(/\./g, '-') + '.htm',
+                    func = this.funcprops.origin.toLocaleLowerCase().replace(/\./g, '-'),
+                    name = '/Functions/' + func + '.htm',
                     url = 'resources/help/' + lang + name;
 
+                if ( Common.Controllers.Desktop.isActive() ) {
+                    if ( Common.Controllers.Desktop.helpAvailable() )
+                        url = Common.Controllers.Desktop.helpUrl() + name;
+                    else {
+                        const helpCenter = Common.Utils.InternalSettings.get('url-help-center');
+                        if ( helpCenter ) {
+                            const _url_obj = new URL(helpCenter);
+                            _url_obj.searchParams.set('function', func);
+
+                            window.open(_url_obj.toString(), '_blank');
+                        }
+
+                        return;
+                    }
+                }
+
                 fetch(url).then(function(response){
                     if ( response.ok ) {
                         Common.Utils.InternalSettings.set("sse-settings-func-help", lang);
                         me.helpUrl = url;
                         me.showHelp();
                     } else {
-                        lang = '{{DEFAULT_LANG}}';
-                        url = 'resources/help/' + lang + name;
+                        url = 'resources/help/' + '{{DEFAULT_LANG}}' + name;
                         fetch(url).then(function(response){
                             if ( response.ok ) {
-                                Common.Utils.InternalSettings.set("sse-settings-func-help", lang);
+                                Common.Utils.InternalSettings.set("sse-settings-func-help", '{{DEFAULT_LANG}}');
                                 me.helpUrl = url;
                                 me.showHelp();
                             } else {
-                                me.helpUrl = null;
+                                // me.helpUrl = null;
+                                if ( Common.Controllers.Desktop.isActive() ) {
+                                    url = 'resources/help/' + lang + name;
+                                }
                             }
                         });
                     }