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Outlook users warned against opening more than 60 emails or their software will crash

Outlook users warned against opening more than 60 emails or their software will crash

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    The Microsoft Outlook logo on a laptop screen.     The Microsoft Outlook logo on a laptop screen.

Credit: Shutterstock/monticello


  • Reports claim that Outlook Classic crashes if users open more than 60 emails at a time

  • Don’t open so many or use a solution that could affect your entire system

  • Microsoft is investigating the problem, hopefully a patch will follow soon


Microsoft has confirmed a bug in classic Outlook for Office 365 users cause the mail app to crash when they open more than 60 emails at the same time.

The issue, which results in a memory error message, causes the app to crash and close, meaning users lose their place when multitasking.

Microsoft has the problem with its email serviceand confirmed that a team of engineers has been investigating the issue, but for now users are warned not to open more than 60 emails at once.

Outlook Classic crashes for some users

Microsoft shared the error message: “Sorry, we’re having trouble opening this item. This may be temporary, but if you see it again you may want to restart Outlook. Insufficient memory or system resources. Close some windows or programs and try again.’

Users may also see another pop-up: ‘Insufficient memory or system resources. Close some windows or programs and try again.

While it appears the company is currently working on a solution, each solution may come with its own set of challenges. “Increasing process quotas could lead to general system instability,” Microsoft said, suggesting that broader system instability could be the result of system changes.

The cause of the problem has not been confirmed, but Microsoft has indicated that user interface objects may be responsible for Outlook Classic suddenly crashing.

In addition to limiting the number of emails they open or increasing the process quota for user objects, users will have to wait for Microsoft to release a patch.

TechRadar Pro has asked Microsoft to confirm if and when a patch will be available. Any update will be shared here.

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