Introduction

How to disable the Zivver Outlook Web Access Add-in in Outlook when your organization uses both that Zivver add-in and the Zivver Office Plugin.

The Zivver add-in is by default available in Outlook because it is installed in Exchange Online. The add-in in Outlook can be confusing for users. Thus, Zivver recommends to disable the add-in button in the Outlook ribbon.

Requirements

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

Disable the Zivver Outlook Web Access Add-in

• For one user through Local Security Policy
• For multiple users through Domain Group Policy

Disable the Zivver Outlook Web Access Add-in with Local Security Policy for one 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. Go to the temporary folder and copy the file outlk16.admx to %windir%\Policydefinitions.
4. From the correct language folder in the temporary folder, copy the outlk16.adml file to corresponding folder in %windir%\Policydefinitions\en-us.
   For English: en-us
   For Dutch: nl-nl
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 equivalent COM or VSTO add-in is installed.
8. Set the value name as ZivverOfficePlugin.AddinModule and the Value as
   1. 0df8bc4d-cef5-40ac-8ef5-930b8350ec9d for Outlook Web Access Add-in V4
   2. 0df8bc4d-cef5-40ac-8ef5-930b8350ec9e for Outlook Web Access Add-in V5
   3. 2e6cbf09-5d6c-49ed-a0c6-7202e087f09b for Outlook Web Access Add-in V6 (beta)
      Check your Microsoft 365 admin center to find out which version of the Outlook Web Access Add-in you are using.
9. Click OK to save the settings.
10. Restart Outlook to enable the change.

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

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. Install the outlk16.admx file and outlk16.adml file (from the corresponding language folder) in the Policy Object Store.
   How to create and manage the Central Store for Group Policy Administrative Templates in Windows
4. Open the Group Policy Editor (gpedit.msc).
5. Create a new user policy or edit an existing user policy.
6. Navigate to User Configuration > Administrative Templates > Microsoft Outlook 2016 > Miscellaneous.
7. Open the setting Deactivate Outlook web add-ins whose equivalent COM or VSTO add-in is installed.
8. Set the Name as ZivverOfficePlugin.AddinModule and the Value as
   1. 0df8bc4d-cef5-40ac-8ef5-930b8350ec9d for Outlook Web Access Add-in V4
   2. 0df8bc4d-cef5-40ac-8ef5-930b8350ec9e for Outlook Web Access Add-in V5
   3. 2e6cbf09-5d6c-49ed-a0c6-7202e087f09b for Outlook Web Access Add-in V6 (beta)
      Check your Microsoft 365 admin center to find out which version of the Outlook Web Access Add-in you are using.
9. Save the policy.
10. Deploy the policy to the Zivver Office Plugin users.
    After a gpupdate the policy comes in effect. Then, after a restart of Outlook the button is removed.

How do you know it worked?

The Zivver add-in button is normally visible under Home in the Outlook ribbon. The caption says Read securely with Zivver with subtitle Zivver Group. If this button is not visible, the change was successful.

If the button is still visible, do a check whether you used the correct installer, the 32-bit or 64-bit.