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    There is a new symptom of Outlook crashing on launch starting on 7/15/2020.   A fix has been published but will take time to propagate to worldwide availability.   Outlook will automatically look for the fix on launch, so if this issue persists through multiple launches please use Outlook Web Access (or your providers webmail interface) for an hour then try again.   

    This problem is not associated with any of the 7/15/2020 security patches so there is no need to uninstall them if Outlook will not launch.  If this issue persists beyond four hours please contact Microsoft Support by whichever means works best for you.

    Additional details can be found in the admin center under EX218604 and OL218603.

Example crash symptoms:

  1. You may see an error such as:

    "Outlook couldn't start last time. Safe mode could help you troubleshoot the problem, but some features might not be available in this mode.

    Do you want to start in Safe Mode?"

  2. In the event viewer you will see a crash event like:

    1. Faulting application name: OUTLOOK.EXE, version: 16.0.13102.20002, time stamp: 0x5efe7a9e

      Faulting module name: OUTLOOK.EXE, version: 16.0.13102.20002, time stamp: 0x5efe7a9e

      Exception code: 0xc0000005

      Fault offset: 0x00000000001a40fa

      Faulting process id: 0x3f60

      Faulting application start time: 0x01d65ac2602949dd

      Faulting application path: C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXE

      Faulting module path: C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXE

      Report Id: 81a20cc2-6c7f-4635-90ba-54319c3fce75

      Faulting package full name:

      Faulting package-relative application ID:

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