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Outlook Addin cannot be activated

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byChristian Schröder
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Question: After installation or update, the REDDCRYPT Addin can not be started. Outlook might report, that the REDDCRYPT Addin was deactivated.

Info: Reason for this behavior is the Add In Resiliency in Outlook, that was implemented since Office 2013 to deactivate Add Ins, when Outlook is running slow.

Solution: The following steps are required as a work around to the Add In Resiliency behavior:

  1. Close Outlook
  2. Start regedit
  3. Delete all entries in HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\xx.x\Outlook\Resiliency\DisabledItems.
    xx.x refers to the office version number and needs to be adjusted accordingly
    Warning: Each previously deactivated Addins will be activated at start (but it is required, as one cannot know which entry refers to which Addin).
  4. Create a new DWORD Entry with the name ReddCryptAddin.AddinModule and the Value 1 in the folling path:
    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\xx.x\Outlook\Resiliency\DoNotDisableAddinList
    xx.x refers to the office version number and needs to be adjusted accordingly
  5. Start Outlook and deactivate all Addins that you wish to be deactivated (to fill the List that was previously given in step 3).

Download Regfix file

The following Regfix file may also solve the problem (please let your IT department make changes to the registry with caution).

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