diff --git a/apps/documenteditor/main/app/controller/Main.js b/apps/documenteditor/main/app/controller/Main.js
index 075c2b5fd..60d9c45f6 100644
--- a/apps/documenteditor/main/app/controller/Main.js
+++ b/apps/documenteditor/main/app/controller/Main.js
@@ -472,9 +472,7 @@ define([
                     docInfo.put_EncryptedInfo(this.editorConfig.encryptionKeys);
                     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);
+                    docInfo.put_CoEditingMode(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' ? this.editorConfig.coEditing.mode || 'fast' : 'fast');
 
                     var enable = !this.editorConfig.customization || (this.editorConfig.customization.macros!==false);
                     docInfo.asc_putIsEnabledMacroses(!!enable);
diff --git a/apps/documenteditor/mobile/src/controller/Main.jsx b/apps/documenteditor/mobile/src/controller/Main.jsx
index ad7558b87..43dbbf10c 100644
--- a/apps/documenteditor/mobile/src/controller/Main.jsx
+++ b/apps/documenteditor/mobile/src/controller/Main.jsx
@@ -133,8 +133,8 @@ class MainController extends Component {
                     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);
+                    // docInfo.put_CoEditingMode(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' ? this.editorConfig.coEditing.mode || 'fast' : 'fast');
+                    docInfo.put_CoEditingMode('strict'); // need to change!!!
 
                     let enable = !this.editorConfig.customization || (this.editorConfig.customization.macros !== false);
                     docInfo.asc_putIsEnabledMacroses(!!enable);
diff --git a/apps/presentationeditor/main/app/controller/Main.js b/apps/presentationeditor/main/app/controller/Main.js
index d62ba8a12..4f04f6a21 100644
--- a/apps/presentationeditor/main/app/controller/Main.js
+++ b/apps/presentationeditor/main/app/controller/Main.js
@@ -429,9 +429,7 @@ define([
                     docInfo.put_EncryptedInfo(this.editorConfig.encryptionKeys);
                     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);
+                    docInfo.put_CoEditingMode(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' ? this.editorConfig.coEditing.mode || 'fast' : 'fast');
 
                     var enable = !this.editorConfig.customization || (this.editorConfig.customization.macros!==false);
                     docInfo.asc_putIsEnabledMacroses(!!enable);
diff --git a/apps/presentationeditor/mobile/src/controller/Main.jsx b/apps/presentationeditor/mobile/src/controller/Main.jsx
index f9d8ed33f..8fc91169b 100644
--- a/apps/presentationeditor/mobile/src/controller/Main.jsx
+++ b/apps/presentationeditor/mobile/src/controller/Main.jsx
@@ -124,8 +124,8 @@ class MainController extends Component {
                     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);
+                    // docInfo.put_CoEditingMode(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' ? this.editorConfig.coEditing.mode || 'fast' : 'fast');
+                    docInfo.put_CoEditingMode('strict'); // need to change!!!
 
                     let enable = !this.editorConfig.customization || (this.editorConfig.customization.macros !== false);
                     docInfo.asc_putIsEnabledMacroses(!!enable);
diff --git a/apps/spreadsheeteditor/main/app/controller/Main.js b/apps/spreadsheeteditor/main/app/controller/Main.js
index fd66dbd5d..a7175fe23 100644
--- a/apps/spreadsheeteditor/main/app/controller/Main.js
+++ b/apps/spreadsheeteditor/main/app/controller/Main.js
@@ -503,9 +503,7 @@ define([
                     docInfo.put_EncryptedInfo(this.editorConfig.encryptionKeys);
                     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);
+                    docInfo.put_CoEditingMode(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' ? this.editorConfig.coEditing.mode || 'fast' : 'fast');
 
                     var enable = !this.editorConfig.customization || (this.editorConfig.customization.macros!==false);
                     docInfo.asc_putIsEnabledMacroses(!!enable);
diff --git a/apps/spreadsheeteditor/mobile/src/controller/Main.jsx b/apps/spreadsheeteditor/mobile/src/controller/Main.jsx
index 37d678f56..a4bd03aa2 100644
--- a/apps/spreadsheeteditor/mobile/src/controller/Main.jsx
+++ b/apps/spreadsheeteditor/mobile/src/controller/Main.jsx
@@ -171,8 +171,8 @@ class MainController extends Component {
                     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);
+                    // docInfo.put_CoEditingMode(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object' ? this.editorConfig.coEditing.mode || 'fast' : 'fast');
+                    docInfo.put_CoEditingMode('strict'); // need to change!!!
 
                     const appOptions = this.props.storeAppOptions;
                     let enable = !appOptions.customization || (appOptions.customization.macros !== false);