diff --git a/apps/documenteditor/main/app/controller/Viewport.js b/apps/documenteditor/main/app/controller/Viewport.js
index 43b07abda..b9a8ef37d 100644
--- a/apps/documenteditor/main/app/controller/Viewport.js
+++ b/apps/documenteditor/main/app/controller/Viewport.js
@@ -107,6 +107,8 @@ define([
         setApi: function(api) {
             this.api = api;
             this.api.asc_registerCallback('asc_onZoomChange', this.onApiZoomChange.bind(this));
+            this.api.asc_registerCallback('asc_onCoAuthoringDisconnect',this.onApiCoAuthoringDisconnect.bind(this));
+            Common.NotificationCenter.on('api:disconnect',              this.onApiCoAuthoringDisconnect.bind(this));
         },
 
 
@@ -364,6 +366,17 @@ define([
             }
         },
 
+        onApiCoAuthoringDisconnect: function() {
+            if (this.header) {
+                if (this.header.btnDownload)
+                    this.header.btnDownload.hide();
+                if (this.header.btnPrint)
+                    this.header.btnPrint.hide();
+                if (this.header.btnEdit)
+                    this.header.btnEdit.hide();
+            }
+        },
+
         textFitPage: 'Fit to Page',
         textFitWidth: 'Fit to Width'
     }, DE.Controllers.Viewport));
diff --git a/apps/presentationeditor/main/app/controller/Viewport.js b/apps/presentationeditor/main/app/controller/Viewport.js
index 87aee107b..ac65b35ea 100644
--- a/apps/presentationeditor/main/app/controller/Viewport.js
+++ b/apps/presentationeditor/main/app/controller/Viewport.js
@@ -114,6 +114,8 @@ define([
         setApi: function(api) {
             this.api = api;
             this.api.asc_registerCallback('asc_onZoomChange', this.onApiZoomChange.bind(this));
+            this.api.asc_registerCallback('asc_onCoAuthoringDisconnect',this.onApiCoAuthoringDisconnect.bind(this));
+            Common.NotificationCenter.on('api:disconnect',              this.onApiCoAuthoringDisconnect.bind(this));
         },
 
 
@@ -402,6 +404,17 @@ define([
             }
         },
 
+        onApiCoAuthoringDisconnect: function() {
+            if (this.header) {
+                if (this.header.btnDownload)
+                    this.header.btnDownload.hide();
+                if (this.header.btnPrint)
+                    this.header.btnPrint.hide();
+                if (this.header.btnEdit)
+                    this.header.btnEdit.hide();
+            }
+        },
+
         textFitPage: 'Fit to Page',
         textFitWidth: 'Fit to Width'
     }, PE.Controllers.Viewport));
diff --git a/apps/spreadsheeteditor/main/app/controller/Viewport.js b/apps/spreadsheeteditor/main/app/controller/Viewport.js
index aacac3680..13d390bcd 100644
--- a/apps/spreadsheeteditor/main/app/controller/Viewport.js
+++ b/apps/spreadsheeteditor/main/app/controller/Viewport.js
@@ -122,6 +122,8 @@ define([
             this.api.asc_registerCallback('asc_onSheetsChanged',            this.onApiSheetChanged.bind(this));
             this.api.asc_registerCallback('asc_onUpdateSheetViewSettings',  this.onApiSheetChanged.bind(this));
             this.api.asc_registerCallback('asc_onEditCell',                 this.onApiEditCell.bind(this));
+            this.api.asc_registerCallback('asc_onCoAuthoringDisconnect',this.onApiCoAuthoringDisconnect.bind(this));
+            Common.NotificationCenter.on('api:disconnect',              this.onApiCoAuthoringDisconnect.bind(this));
         },
 
         onAppShowed: function (config) {
@@ -409,6 +411,17 @@ define([
             }
         },
 
+        onApiCoAuthoringDisconnect: function() {
+            if (this.header) {
+                if (this.header.btnDownload)
+                    this.header.btnDownload.hide();
+                if (this.header.btnPrint)
+                    this.header.btnPrint.hide();
+                if (this.header.btnEdit)
+                    this.header.btnEdit.hide();
+            }
+        },
+
         textHideFBar: 'Hide Formula Bar',
         textHideHeadings: 'Hide Headings',
         textHideGridlines: 'Hide Gridlines',