Initial situation: The REDDCRYPT Outlook Addin cannot be started after installation or an update. Outlook may report that the REDDCRYPT Addin has been deactivated.

Info: The reason for the behavior is the Add In Resiliency of Outlook, which has been available since Office 2013 and deactivates the Add Ins if Outlook is too slow.

Solution: The following steps are necessary to bypass the Add In Resiliency function:

1. Outlook Close
2. Start Regedit
3. In the path HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\xx.x\Outlook\Resiliency\DisabledItems delete all entries
   xx.x refers to the Office version number and must be adjusted accordingly.
   ATTENTION: ALL currently deactivated addins are reactivated at startup (but this is necessary for the time being, as the values deactivated there do not clearly refer to an addin).
4. Create a new DWORD entry with the name ReddCryptAddin.AddinModule and the value 1 in the following path: HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\xx.x\Outlook\Resiliency\DoNotDisableAddinList
   xx.x refers to the Office version number and must be adjusted accordingly
5. Start Outlook and deactivate the add-ins that you want to have deactivated (so that the DisabledItems list from point 3 is as desired again).

Regfix for download

Subsequent regfix files could also solve the problem (please ask your IT department to make changes to the registry with caution).

• For Outlook 2013: RegFix-2013.zip
• For Outlook from 2016: RegFix-2016 + 2019 + Office365.zip

Please make sure that the latest updates for Outlook are installed (File => Oficce Account => Office Updates).