diff --git a/apps/common/main/lib/component/Window.js b/apps/common/main/lib/component/Window.js
index 0f4583993..74f4ca659 100644
--- a/apps/common/main/lib/component/Window.js
+++ b/apps/common/main/lib/component/Window.js
@@ -493,7 +493,7 @@ define([
                     footer.find('.dlg-btn').on('click', onBtnClick);
                     chDontShow = new Common.UI.CheckBox({
                         el: win.$window.find('.dont-show-checkbox'),
-                        labelText: win.textDontShow
+                        labelText: options.textDontShow || win.textDontShow
                     });
                     autoSize(obj);
                 },
@@ -506,13 +506,14 @@ define([
             });
 
             win.show();
+            return win;
         };
 
         Common.UI.error = function(options) {
             options = options || {};
             !options.title && (options.title = this.Window.prototype.textError);
 
-            Common.UI.alert(
+            return Common.UI.alert(
                 _.extend(options, {
                     iconCls: 'error'
                 })
@@ -523,7 +524,7 @@ define([
             options = options || {};
             !options.title && (options.title = this.Window.prototype.textConfirmation);
 
-            Common.UI.alert(
+            return Common.UI.alert(
                 _.extend(options, {
                     iconCls: 'confirm'
                 })
@@ -534,7 +535,7 @@ define([
             options = options || {};
             !options.title && (options.title = this.Window.prototype.textInformation);
 
-            Common.UI.alert(
+            return Common.UI.alert(
                 _.extend(options, {
                     iconCls: 'info'
                 })
@@ -545,7 +546,7 @@ define([
             options = options || {};
             !options.title && (options.title = this.Window.prototype.textWarning);
 
-            Common.UI.alert(
+            return Common.UI.alert(
                 _.extend(options, {
                     iconCls: 'warn'
                 })
diff --git a/apps/documenteditor/main/app/controller/Main.js b/apps/documenteditor/main/app/controller/Main.js
index 6ae016dc0..a9eaa7219 100644
--- a/apps/documenteditor/main/app/controller/Main.js
+++ b/apps/documenteditor/main/app/controller/Main.js
@@ -1343,6 +1343,7 @@ define([
                     /** coauthoring begin **/
                     me.api.asc_registerCallback('asc_onCollaborativeChanges',    _.bind(me.onCollaborativeChanges, me));
                     me.api.asc_registerCallback('asc_OnTryUndoInFastCollaborative',_.bind(me.onTryUndoInFastCollaborative, me));
+                    me.api.asc_registerCallback('asc_onConvertEquationToMath',_.bind(me.onConvertEquationToMath, me));
                     /** coauthoring end **/
 
                     if (me.stackLongActions.exist({id: ApplyEditRights, type: Asc.c_oAscAsyncActionType['BlockInteraction']})) {
@@ -2192,6 +2193,30 @@ define([
                 this.appOptions.canUseHistory = false;
             },
 
+            onConvertEquationToMath: function(equation) {
+                var me = this,
+                    win;
+                var msg = this.textConvertEquation + '<br><br><a id="id-equation-convert-help" style="cursor: pointer;">' + this.textLearnMore + '</a>';
+                win = Common.UI.warning({
+                    width: 500,
+                    msg: msg,
+                    buttons: ['yes', 'cancel'],
+                    primary: 'yes',
+                    dontshow: true,
+                    textDontShow: this.textApplyAll,
+                    callback: _.bind(function(btn, dontshow){
+                        if (btn == 'yes') {
+                            this.api.asc_ConvertEquationToMath(equation, dontshow);
+                        }
+                        this.onEditComplete();
+                    }, this)
+                });
+                win.$window.find('#id-equation-convert-help').on('click', function (e) {
+                    win && win.close();
+                    me.getApplication().getController('LeftMenu').getView('LeftMenu').showMenu('file:help', 'UsageInstructions\/InsertEquation.htm');
+                })
+            },
+
             leavePageText: 'You have unsaved changes in this document. Click \'Stay on this Page\' then \'Save\' to save them. Click \'Leave this Page\' to discard all the unsaved changes.',
             criticalErrorTitle: 'Error',
             notcriticalErrorTitle: 'Warning',
@@ -2538,7 +2563,10 @@ define([
             txtChoose: 'Choose an item.',
             errorDirectUrl: 'Please verify the link to the document.<br>This link must be a direct link to the file for downloading.',
             txtStyle_Caption: 'Caption',
-            errorCompare: 'The Compare documents feature is not available in the co-editing mode.'
+            errorCompare: 'The Compare documents feature is not available in the co-editing mode.',
+            textConvertEquation: 'This equation was created with an old version of equation editor which is no longer supported. Converting this equation to Office Math ML format will make it editable.<br>Do you want to convert this equation?',
+            textApplyAll: 'Apply to all equations',
+            textLearnMore: 'Learn More'
         }
     })(), DE.Controllers.Main || {}))
 });
\ No newline at end of file
diff --git a/apps/documenteditor/main/locale/en.json b/apps/documenteditor/main/locale/en.json
index bdb5fd2be..8424d3d9c 100644
--- a/apps/documenteditor/main/locale/en.json
+++ b/apps/documenteditor/main/locale/en.json
@@ -721,6 +721,9 @@
   "DE.Controllers.Main.warnNoLicense": "This version of %1 editors has certain limitations for concurrent connections to the document server.<br>If you need more please consider purchasing a commercial license.",
   "DE.Controllers.Main.warnNoLicenseUsers": "This version of %1 editors has certain limitations for concurrent users.<br>If you need more please consider purchasing a commercial license.",
   "DE.Controllers.Main.warnProcessRightsChange": "You have been denied the right to edit the file.",
+  "DE.Controllers.Main.textConvertEquation": "This equation was created with an old version of equation editor which is no longer supported. Converting this equation to Office Math ML format will make it editable.<br>Do you want to convert this equation?",
+  "DE.Controllers.Main.textApplyAll": "Apply to all equations",
+  "DE.Controllers.Main.textLearnMore": "Learn More",
   "DE.Controllers.Navigation.txtBeginning": "Beginning of document",
   "DE.Controllers.Navigation.txtGotoBeginning": "Go to the beginning of the document",
   "DE.Controllers.Statusbar.textHasChanges": "New changes have been tracked",