How to permanently disable zimbra Add-ins (Outlook)

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How to permanently disable zimbra Add-ins (Outlook)

   KB 23784        Last updated on 2018-10-29  

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Sometimes we need to disable the zimbra Add-ins in Outlook, and to leave them disabled permanently. But after a restart they are again enabled.



To disable the add-ins permanently, we need to stop Outlook, and then open regedit as Administrator.


1. Open the regedit and navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Outlook\Addins

Inside you will see the two add-ins we need to disable:


2. When we click on one of both entries, on the right we can see the LoadBehavior DWORD:


By default it is enabled and with hex value of three (3). (For more information on the possible values refer to the Additional Content section below).

3. To disable the add-in, we have to set a value of zero (0).

4. Once we set that to zero, close regedit, and open Outlook. The add-ins should now be disabled.

Additional Content

For more information on the possible values for the Loadbehavior DWORD, see this link

Verified Against: Zimbra Collaboration 8.8, 8.7, 8.6 Date Created: 29/10/2018
Article ID: Date Modified: 2018-10-29

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Wiki/KB reviewed by SME1 SME2 COPY EDITOR Last edit by Teodor Vizirov
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