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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 Mimecast Outlook Plugin add-in that keeps being unloaded in Outlook 2 Enabling inactive Mimecast Outlook Plugin add-in that keeps being unloaded in Outlook 1](https://techygeekshome.info/wp-content/uploads/2016/12/outlookreg1-300x75.png)
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 Mimecast Outlook Plugin add-in that keeps being unloaded in Outlook 3 Enabling inactive Mimecast Outlook Plugin add-in that keeps being unloaded in Outlook 2](https://techygeekshome.info/wp-content/uploads/2016/12/outlookreg2-300x200.png)
Reinstall the software that provided the add-in and then restart Outlook. The add-in should now load.
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