Off-Topic: Outlook Plugins do not activate when program starts – registry fix

skypemeetingIn my sporadic series of IT fixes that I happen to find, here is another one about how to fix the load behavior of plugins in Outlook.

This is a solution to a problem that I have had myself with plugins for Outlook. I assume it works the same for other office programs. Basically, some plugins, in particular the Skype Meeting/Lync Meeting plugin, would not load when Outlook started and I was forced to manually enable it in the add-ons manager each time. Highly annoying. I managed to fix it by doing a small registry fix.

There is a Microsoft help article that gives the outline of the solution at

Here are the details:

  • Start the registry editor in Windows
  • Find the key HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins\
  • This location should have a list of add-ons or addins (the term seems to vary). Select the one that is problematic.
  • Check the “LoadBehavior” value, and make sure it is set to 0x03.
    • In my case, it was set to 0x02, and changing it to 0x03 fixed the problem.


I would expect the same method to work or other addins/add-ons/plugins.

I have seen some threads on the Internet where people just uninstall and reinstall the plugin, and I would expect that to achieve the same registry change in a roundabout way.

Why the load behavior changed in the first place I have no idea unfortunately.

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