diff --git a/apps/documenteditor/main/app/controller/Main.js b/apps/documenteditor/main/app/controller/Main.js
index 8a84354e2..d0db04c58 100644
--- a/apps/documenteditor/main/app/controller/Main.js
+++ b/apps/documenteditor/main/app/controller/Main.js
@@ -473,9 +473,6 @@ define([
                     docInfo.put_Lang(this.editorConfig.lang);
                     docInfo.put_Mode(this.editorConfig.mode);
 
-                    if (this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.mode!==undefined)
-                        docInfo.put_CoEditingMode(this.editorConfig.coEditing.mode);
-
                     var enable = !this.editorConfig.customization || (this.editorConfig.customization.macros!==false);
                     docInfo.asc_putIsEnabledMacroses(!!enable);
                     enable = !this.editorConfig.customization || (this.editorConfig.customization.plugins!==false);
@@ -1567,8 +1564,9 @@ define([
                     Common.NotificationCenter.on('comments:showdummy', _.bind(this.onShowDummyComment, this));
 
                 // change = true by default in editor
+                this.appOptions.canLiveView = !!params.asc_getLiveViewerSupport() && (this.editorConfig.mode === 'view') && !isPDFViewer; // viewer: change=false when no flag canLiveViewer (i.g. old license), change=true by default when canLiveViewer==true
                 this.appOptions.canChangeCoAuthoring = this.appOptions.isEdit && this.appOptions.canCoAuthoring && !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.change===false) ||
-                                                    !this.appOptions.isEdit && !this.appOptions.isRestrictedEdit && (this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.change===true) ;
+                                                       this.appOptions.canLiveView && !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.change===false);
 
                 this.loadCoAuthSettings();
                 this.applyModeCommonElements();
diff --git a/apps/presentationeditor/main/app/controller/Main.js b/apps/presentationeditor/main/app/controller/Main.js
index cca7e3d99..9f12663c8 100644
--- a/apps/presentationeditor/main/app/controller/Main.js
+++ b/apps/presentationeditor/main/app/controller/Main.js
@@ -430,8 +430,10 @@ define([
                     docInfo.put_Lang(this.editorConfig.lang);
                     docInfo.put_Mode(this.editorConfig.mode);
 
-                    if (this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.mode!==undefined)
-                        docInfo.put_CoEditingMode(this.editorConfig.coEditing.mode);
+                    var coEditMode = !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object') ? 'fast' : // fast by default
+                                     this.editorConfig.mode === 'view' && this.editorConfig.coEditing.change!==false ? 'fast' : // if can change mode in viewer - set fast for using live viewer
+                                     this.editorConfig.coEditing.mode || 'fast';
+                    docInfo.put_CoEditingMode(coEditMode);
 
                     var enable = !this.editorConfig.customization || (this.editorConfig.customization.macros!==false);
                     docInfo.asc_putIsEnabledMacroses(!!enable);
@@ -1208,8 +1210,9 @@ define([
                 this.editorConfig.customization && Common.UI.FeaturesManager.init(this.editorConfig.customization.features, this.appOptions.canBrandingExt);
 
                 // change = true by default in editor
+                this.appOptions.canLiveView = !!params.asc_getLiveViewerSupport() && (this.editorConfig.mode === 'view'); // viewer: change=false when no flag canLiveViewer (i.g. old license), change=true by default when canLiveViewer==true
                 this.appOptions.canChangeCoAuthoring = this.appOptions.isEdit && this.appOptions.canCoAuthoring && !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.change===false) ||
-                                                    !this.appOptions.isEdit && !this.appOptions.isRestrictedEdit && (this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.change===true) ;
+                                                       this.appOptions.canLiveView && !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.change===false);
 
                 this.loadCoAuthSettings();
                 this.applyModeCommonElements();
diff --git a/apps/spreadsheeteditor/main/app/controller/Main.js b/apps/spreadsheeteditor/main/app/controller/Main.js
index 8598335bd..3cbd72ca0 100644
--- a/apps/spreadsheeteditor/main/app/controller/Main.js
+++ b/apps/spreadsheeteditor/main/app/controller/Main.js
@@ -504,8 +504,10 @@ define([
                     docInfo.put_Lang(this.editorConfig.lang);
                     docInfo.put_Mode(this.editorConfig.mode);
 
-                    if (this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.mode!==undefined)
-                        docInfo.put_CoEditingMode(this.editorConfig.coEditing.mode);
+                    var coEditMode = !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object') ? 'fast' : // fast by default
+                                     this.editorConfig.mode === 'view' && this.editorConfig.coEditing.change!==false ? 'fast' : // if can change mode in viewer - set fast for using live viewer
+                                     this.editorConfig.coEditing.mode || 'fast';
+                    docInfo.put_CoEditingMode(coEditMode);
 
                     var enable = !this.editorConfig.customization || (this.editorConfig.customization.macros!==false);
                     docInfo.asc_putIsEnabledMacroses(!!enable);
@@ -1295,10 +1297,11 @@ define([
                 this.appOptions.canHelp        = !((typeof (this.editorConfig.customization) == 'object') && this.editorConfig.customization.help===false);
                 this.appOptions.isRestrictedEdit = !this.appOptions.isEdit && this.appOptions.canComments;
 
-                // change = true by default in editor, change = false by default in viewer
+                // change = true by default in editor
+                this.appOptions.canLiveView = !!params.asc_getLiveViewerSupport() && (this.editorConfig.mode === 'view'); // viewer: change=false when no flag canLiveViewer (i.g. old license), change=true by default when canLiveViewer==true
                 this.appOptions.canChangeCoAuthoring = this.appOptions.isEdit && !(this.appOptions.isEditDiagram || this.appOptions.isEditMailMerge || this.appOptions.isEditOle) && this.appOptions.canCoAuthoring &&
-                                                        !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.change===false) ||
-                                                        !this.appOptions.isEdit && !this.appOptions.isRestrictedEdit && (this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.change===true) ;
+                                                       !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.change===false) ||
+                                                       this.appOptions.canLiveView && !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' && this.editorConfig.coEditing.change===false);
 
                 if (!this.appOptions.isEditDiagram && !this.appOptions.isEditMailMerge && !this.appOptions.isEditOle) {
                     this.appOptions.canBrandingExt = params.asc_getCanBranding() && (typeof this.editorConfig.customization == 'object' || this.editorConfig.plugins);