There is a new symptom of Outlook is crashing on launch starting 7/15. 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 for an hour then try again.
If this issue persists beyond four hours please contact Microsoft Support by whichever means works best for you.
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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?"
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In the event viewer you will see a crash event like:
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Faulting application name: OUTLOOK.EXE, version: 16.0.13102.20002, time stamp: 0x5efe7a9eFaulting module name: OUTLOOK.EXE, version: 16.0.13102.20002, time stamp: 0x5efe7a9eException code: 0xc0000005Fault offset: 0x00000000001a40faFaulting process id: 0x3f60Faulting application start time: 0x01d65ac2602949ddFaulting application path: C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXEFaulting module path: C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXEReport Id: 81a20cc2-6c7f-4635-90ba-54319c3fce75Faulting package full name:Faulting package-relative application ID:Microsoft suggests users use web and mobile clients until the issue is resolved.Title: Users experiencing Outlook connection issues and crashesUser Impact: Users may experience crashes or may be unable to access Exchange Online via Outlook.More info: Our analysis indicates that Outlook on the web and mobile clients are unaffected. Users may be able to leverage those protocols as an alternative means to access email and service features while we remediate this problem.Current status: Our initial review of the available data indicates that recently deployed updates are the likely source of the problem. We're performing an analysis of all recent service updates to isolate the underlying cause of the problem and to determine the most expedient means to restore service.Scope of impact: This issue may potentially affect any of your users attempting to use Outlook.you could tryOpen cmd, run:cd "\Program Files\Common Files\microsoft shared\ClickToRun"then:officec2rclient.exe /update user updatetoversion=16.0.12827.20470
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