outlook keeps freezing

Hello Ram Mandelman,

Thank you for posting this case in Microsoft Community!

Based on your description: Outlook keeps freezing. I would like to cooperate with you working on this case. To clarify this case, do you mean if refers to Microsoft 365 Copilot or Windows Copilot which caused Outlook freezing case? If refers to Microsoft 365 Copilot, you may contact your Microsoft 365 admin and help to remove the assigned license of your email account to disable this feature normally. If refers to Windows Copilot, you may try below workaround to disable this feature and check if make your Outlook client stop freezing. Copy and paste in the command below as admin level and press enter:

reg add HKCU\Software\Policies\Microsoft\Windows\WindowsCopilot /v TurnOffWindowsCopilot /t REG_DWORD /d 1 /f

For Outlook freezing issue, you may also check following workaround to narrow down the case. Here are the article as reference:

Outlook not responding, stuck at "Processing," stopped working, or freezes

Outlook crashes or stops responding when used with Office 365

We do understand your concern about this Copilot feature and appreciate your valuable suggestions, it is strongly recommended to submit your valuable feedback directly to the Microsoft product development team by either go to Help from your dedicated App > submit Feedback or by posting on Outlook · Community (microsoft.com) for feature improvement. In the meantime, I do apologize for the inconvenience this may cause and I will also update here once I get additional information and the specific timeline for the feature improvement.

Please note that nobody here is the product developer/decision maker and has no control over the product. Everyone, including us as a community moderator, can only assist you with the query for providing available solutions and the feature's availability status within our scope and capability.

To check more details about how to submit feedback, kindly refer to this article Learn about how to provide feedback to Microsoft - Microsoft 365 admin | Microsoft Learn

Thank you for your time and understanding. For other questions, feel free to add your post to the Microsoft Community.

Your understanding and patience will be appreciated.

Thank you!

We have had the same problem since the last patchday in October - Outlook keeps freezing (Office 2019, 2021 and 2024, regardless of whether Windows 10 or 11 or Server 2019). Our hopes were now pinned on the patchday of 12 November, but unfortunately nothing has changed, Outlook still crashes. This is really annoying and costs a lot of working time (and nerves). Copilot isn´t active btw.

Did anyone find a Solution?

we also have random Outlook freezes on a terminalserver with office 2024. we even downgraded to office 2021 and it occurs less often but still occurs randomly. no error message no nothing. only task manager helps.