Fix for Outlook Crash

Overview

This article walks through a basic fix for cases where the Microsoft Teams add-in in classic Outlook is missing, unstable, or contributing to Outlook launch problems (primarily on the old version of Outlook). The process starts with opening Outlook in Safe Mode to rule out add-in conflicts, then uses the Windows Registry to change the Teams add-in load behavior if needed.

Steps

Use this procedure when users report one or more of the following in classic Outlook: the Teams Meeting button is missing, Outlook crashes during launch, or the Teams add-in does not load correctly. Microsoft documents Teams Meeting add-in troubleshooting for classic Outlook in its support guidance.

  1. Close Outlook completely 
     
  2. Press Windows + R to open the Run dialog
     
  3. Type outlook /safe and select OKUploaded Image (Thumbnail)
  4. Confirm whether Outlook opens successfully in Safe Mode
     
  5. Go to File --> Options --> Add InsUploaded Image (Thumbnail)
  6. Find the Microsoft Teams Meeting Add-in for Microsoft Office and turn this offUploaded Image (Thumbnail)
     

If the problem persists or the Teams add-in still needs to be addressed, open the Registry Editor:

  1. Press Windows + R
     
  2. Type regedit
    Uploaded Image (Thumbnail)
  3. Select OK
     
  4. Broswe to the following path: 
    HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins\TeamsAddin.FastConnect​Uploaded Image (Thumbnail)
  5. Locate the LoadBehavior value
     
  6. Change LoadBehavior to 0
     
  7. Close Registry Editor 
     
  8. Reopen Outlook and test the behavior
     
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