Today, Microsoft shared a temporary fix for a known issue causing Outlook Desktop to crash when sending emails from Outlook.com accounts. 

This confirms customer reports regarding crashing issues when using Outlook.com accounts shared on Microsoft's community website and other social networks since last Monday, November 20.

According to online reports, restarting, repairing Outlook, reinstalling the application, and creating a fresh Outlook profile for the impacted email account fails to address the issue. 

"I've tried everything (safe mode, new profile, repair pst, even up to and including a system restore to attempt to roll back a previous installation) to no avail," one of the affected users said.

These problems only affect Outlook for Microsoft 365 users and those in the Current Channel (Preview) channel using Outlook build 17029.20028.

"The issue is fixed in future builds 17029.20052+. However, this build has not been released yet," Microsoft said.

While a limited number of customers did report they had successfully worked around this known issue by reinstalling Office, Microsoft suggests reverting to an earlier version.

To do that, type Command Prompt in the Windows search box, right-click Command Prompt and click Run as administrator.

Next, paste the following commands into the Command Prompt window and hit Enter after each:

Redmond also started rolling out fixes last week for some of the customers affected by another known Microsoft 365 issue behind 'Something Went Wrong [1001]' sign-in errors, rendering desktop Office apps unusable for many affected users.

These ongoing login issues impact customers using Excel, Word, Outlook, and PowerPoint for Microsoft 365, Microsoft 365 Apps for business, and Office apps for iOS and Android, as the company confirmed over a month ago. 

Previously, it fixed another bug causing significant delays for Microsoft 365 customers when saving attachments in Outlook Desktop to a network share.

Earlier this year, Microsoft tackled various other Outlook issues, including ones blocking Microsoft 365 customers from accessing emails and calendars and causing slow starts and freezes during cache re-priming.