Enabling inactive add-in that keeps being unloaded in Outlook

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To enable an inactive add-in that keeps unloading on restart in Outlook you should follow these steps:

First shut down Outlook, then uninstall the software providing the add-in from your machine.

Then go into regedit whilst logged in as the affected user and go to the following location:

HKEY_CURRENT_USERSoftwareMicrosoftOffice15.0OutlookResiliency

Delete the REG_BINARY keys found in DisabledItems and CrashingAddinList folders:

Enabling inactive add-in that keeps being unloaded in Outlook 1

Then navigate to this location:

HKEY_CURRENT_USERSoftwareMicrosoftOfficeOutlookAddins

Then delete the key (folder) that references the add-in (we are using Mimecast as our example below):

Enabling inactive add-in that keeps being unloaded in Outlook 2

Reinstall the software that provided the add-in and then restart Outlook. The add-in should now load.

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About A.J. Armstrong

Founder of TechyGeeksHome and Head Editor for over eight years! IT expert in multiple areas for over 21 years. Sharing experience and knowledge whenever possible! Making IT Happen.

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