If Outlook keeps deactivating an add-in, first of all try to uninstall & reinstall the given add-in. In practice, Outlook may keep deactivating / unloading these add-ins every time when it restarts… Enabling inactive Outlook add-ins that keep being unloaded Normally, you should be able to enable them simply by marking the related check-box in the COM Add-ins manager window (as in the above screenshot or as detailed in this Disabled Add-ins tutorial). In fact, their “Load Behavior” is set to “Unloaded”:Įnabling inactive / unloaded add-ins is trickier than enabling a disabled add-in. If you open the COM Add-ins manager (by clicking on the Manage COM add-ins “Go” button, in the above screenshot), these inactive add-ins are not marked as being enabled, but they are also not marked as being disabled. To better showcase the situation, here is a list of inactive Outlook add-ins (notice there is also a Disabled Add-in below the Inactive list):

For example, if you run the Outlook Product Stability Tool, it may end up making all your Outlook add-ins inactive, but at the same time they are not listed in the Disabled Items list. Sometimes, it may happen that Outlook deactivates an add-in (or all your add-ins) without marking it as being disabled. Most people confuse an inactive add-in with a disabled add-in, but they are not really the same thing. Outlook actually has 3 status labels for add-ins: enabled, disabled and inactive. This articles describes solutions to enable add-ins that are marked as inactive in Outlook but they are NOT marked as disabled.

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