Introduction

How do you disable the Zivver Outlook Web Access Add-in in Outlook when your organization uses both the Zivver add-in and the Zivver Office Plugin?

Because the Zivver Outlook Web Access Add-in is installed at the Exchange level, it is also visible by default in Outlook. This may cause confusion for users. Therefore, Zivver recommends removing the Outlook Web Access Add-in from the Outlook ribbon.

Requirements

• The Zivver Outlook Web Access Add-in in Exchange Online
• The Zivver Office Plugin in Outlook
• Outlook for Windows (version 2102 or later / build: 16.0.13801.XXXXX or later)

Disabling the Zivver Outlook Web Access Add-in in Outlook

• For a single user via Local Security Policy
• For multiple users via a Domain Group Policy

Disable the Outlook Web Access Add-in via Local Security Policy for a single user

1. Download the latest Administrative Templates tool from Microsoft.
   Choose the 32-bit installer for 32-bit Outlook, choose the 64-bit installer for 64-bit Outlook.
   How do I check the bitness of Office?

2. Use the installer to extract the files to a temporary folder.
   For example: C:\Temp\

3. Navigate to the temporary folder and copy the file outlk16.admx to %windir%\Policydefinitions.

4. From the correct language folder in the temporary directory, copy the file outlk16.adml to %windir%\Policydefinitions\<language>.
   For Dutch: nl-nl
   For English: en-us

5. Open the Local Security Policy Editor (gpedit.msc).

6. Navigate to User configuration > Administrative Templates > Microsoft Outlook 2016 > Miscellaneous.

7. Open the setting Deactivate Outlook web add-ins whose equivlent COM or VSTO add-in is installed.

8. Select Enabled.

9. Click the Show... button.

10. Set the value name to 0df8bc4d-cef5-40ac-8ef5-930b8350ec9a and the value to ZivverOfficePlugin.AddinModule.

11. Click OK and save the policy.

12. Restart Outlook to apply the changes.

Disable the Outlook Web Access Add-in with Domain Group Policy for multiple users

1. Download the latest Administrative Templates tool.
   Choose the 32-bit installer for 32-bit Outlook, choose the 64-bit installer for 64-bit Outlook.
   How do I check the bitness of Office?

2. Use the installer to extract the files to a temporary folder.
   For example: C:\Temp\

3. Install the outlk16.admx file and the appropriate outlk16.adml language file in the Policy Object Store.
   Microsoft documentation on creating and managing the Central Store for Group Policy Administrative Templates

4. Open the Group Policy Editor (gpedit.msc).

5. Create a new User Policy or modify an existing one.

6. Navigate to User configuration > Administrative Templates > Microsoft Outlook 2016 > Miscellaneous.

7. Open the setting Deactivate Outlook web add-ins whose equivlent COM or VSTO add-in is installed.

8. Select Enabled.

9. Click the Show... button.

10. Set the value name to 0df8bc4d-cef5-40ac-8ef5-930b8350ec9a and the value to ZivverOfficePlugin.AddinModule.

11. Save the policy.

12. Assign the policy to the Zivver Office Plugin users.
    After running gpupdate, the policy will take effect and after restarting Outlook, the button will be removed.

How do I check if it worked?

The Zivver Outlook Web Access Add-in button normally appears in the Home ribbon with the text Read safely with Zivver and the subtitle Zivver Group. If this button is no longer visible, the change has been applied successfully.

If the button is still visible, verify that the correct bit version of the Administrative Templates tool was used: 32-bit or 64-bit.