Microsoft Outlook clients restarting

Microsoft Outlook clients restarting
July 15, 2020 Comments Off on Microsoft Outlook clients restarting News Fred Dickey

Updated: 7/16/2020

The following is a recent update on this issue from Microsoft. Restarting Outlook will likely fix the issue now but if it doesn’t, scroll down to How to Fix Microsoft Outlook error 0xc0000005 and follow the instructions.

Title: Users experiencing Outlook connection issues and crashes

User Impact: Users may have experienced crashes or may have been unable to access Exchange Online via Outlook. (added by Fast Assist: We also observed customers with third party POP3 email systems experiencing this same issue)

More info: Users may need to restart their Outlook client for the fix to take effect. Our analysis indicates that Outlook on the web and mobile clients were unaffected. Users may have been able to leverage those protocols as an alternative means to access email and service features while we remediated this problem. Affected users would have received an error message that stated: “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?”

Further information on what admins were able to see in event viewer for this crash event could have been found here:

Final status: We’ve confirmed that the issue has been successfully resolved after extended monitoring of our telemetry. If users are continuing to see impact, please restart your Outlook client for the changes to take effect.

Scope of impact: This issue may have potentially affected any of your users attempting to use Outlook.

Start time: Wednesday, July 15, 2020, 10:12 AM (3:12 PM UTC)

End time: Wednesday, July 15, 2020, 5:35 PM (10:35 PM UTC)

Root cause: A recent change to the Outlook client inadvertently resulted in this issue.

Next steps: – We’re reviewing our update procedures to isolate these issues prior to our deployment cycle. – We’re analyzing our telemetry data to better identify these issues before they impact our customers. We’ll publish a post-incident report within five business days.

From Yesterday’s Info:

Fast Assist has already had two clients to call us with this issue effecting several endpoints. All normal Office troubleshooting does not resolve. The issue is update related and we are working the issue with our clients. Please log a ticket in our ticket system if you are experiencing this issue and we will follow up with you. Please log one ticket per organization.

Thank you. More information below.

Update: the workaround fix to get Outlook working is to follow these instructions:

How to fix Microsoft Outlook error 0xc0000005

If Microsoft Outlook is crashing for you with error 0xc0000005 on Windows, follow these steps to fix it:

  1. Open Windows Search.
  2. Type ‘Command Prompt’ and run it with administrator privilege.
  3. In the command line, simply type cd “\Program Files\Common Files\microsoft shared\ClickToRun”
  4. Press enter and Command Prompt will open “ClickToRun” folder of Office.
  5. Type officec2rclient.exe /update user updatetoversion=16.0.12827.20470 and press enter.
  6. Close Command Prompt.

The above command will roll back recent Outlook update and revert back your Outlook for Windows to version 16.0.12827.20470.

If you don’t want to uninstall the recent updates or Outlook still won’t open after applying the aforementioned steps, you can try opening it in safe mode:

  • Press Win+R to open Run.
  • In Run dialog, type “Outlook.exe /safe”
  • Click OK and Outlook will launch in safe mode.

You can also run Outlook in Safe mode by holding Ctrl when you launch the app.

Microsoft believes that a recently deployed update could be the source of this issue. For now, Microsoft is recommending users to use Outlook on the web or mobile clients for Android and iOS.

Microsoft claims it is working on developing a fix as soon as possible and server-side or standalone patch could be made available via traditional update channels soon.

Update 1: Microsoft says a fix has already been published and is rolling out to users worldwide, but it will take time to propagate around the world.


An update has been posted

Title: Latest information from Microsoft, Users experiencing Outlook connection issues and crashes, EX218604

User Impact: Users may experience crashes or may be unable to connect 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: We’ve identified the probable cause of the issue and are applying fixes. We’ve confirmed that our fixes are effective and users will experience service restoration as our solution reaches their respective environments; however, deployment to all affected users may take several hours to complete.

Scope of impact: This issue may potentially affect any of your users attempting to use Outlook.

Time posted

Jul 15, 13:33 CDT

Components affected

OperationalSecure Hosted Exchange – Exchange 201…
OperationalOffice 365


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About The Author
Fred Dickey Fred is the owner and founder of Fast Assist. Fred attended college at the University of Tennessee in Knoxville, majoring in Computer Science, after graduating High School in 1990. Being originally from Nashville TN, Fred boasts over 20 years of professional IT experience, having owned his own IT Support company from 1995 to 2006 when he lived in Knoxville TN. Fred has also worked on the IT Corporate Help Desk of a major Federal contractor from 2008 to 2011 and has experience with ITIL and Enterprise level application and infrastructure support. He has worked for several small IT Support companies between then and now before launching Fast Assist on October 2017.