Teams & Outlook Freezing / Hanging on Windows

Question

Hello,

We are currently experiencing a moderetly widespread issue where the Microsoft Teams and Outlook (Windows desktop applications) are intermittently locking up and becoming unresponsive.

This behavior is occurring on the same machines, but appears random and not tied to any specific action or workflow.

So far, we have attempted the following troubleshooting steps without success:

• Office/Teams repair and full reinstall
• Updating all system drivers, including GPU drivers
• Adjusting application and system graphics settings (hardware acceleration, etc.)
• Switching Outlook back to the Classic version
• Applying latest Windows and Office updates

However, we have made no progress on fixing this problem.

At this time, six users within our organization are affected.

What can the be the root cause for this issue?

Answer 1

We are seeing the same issue Outlook and or teams freezing.

to unfreeze it helps to restart the "Windows Push Notifications User Service_ "

this is of course only symptom resolution. till now we can not find what is the source of the issue.

Answer 2

This Resolved it for US.
https://learn.microsoft.com/en-us/windows-insider/release-notes/release-preview-24h2-25h2/build-26100-8514-26200-8514

Answer 3

Hi @Zimmerman, Kyle,

Welcome to the Microsoft Q&A forum.

To better assist you, could you please provide me with the following information:

• Is the user able to use Teams and Outlook normally on the web version?

At the same time, please try clearing the cache to check whether the issue can be resolved:

1. Clear cache for Teams

Please follow these steps:

Step 1: Fully close Teams

Step 2: Press Windows + R, then enter the following path:

%userprofile%\appdata\local\Packages\MSTeams_8wekyb3d8bbwe\LocalCache\Microsoft\MSTeams

Step 3: Delete all files in this folder

Step 4: Reopen Teams

You may refer to this documentation for more details:

 Clear the Teams client cache - Microsoft Teams | Microsoft Learn

2. Clear cache for Outlook

New Outlook:

Step 1: Fully close Outlook

Step 2: Press Windows + R and enter:

olk.exe --devtools

Step 3: Go to the Application tab

Step 4: Under Local Storage and Cookies, right-click on outlook.office.com and select Clear

Classic Outlook:

Step 1: Fully close Outlook

Step 2: Press Windows + R, then enter the following path:

%userprofile%\AppData\Local\Microsoft\Outlook\HubAppFileCache

Step 3: Delete all files in this folder and restart Outlook

 You may refer to this documentation for more details:

Clear the Office cache - Office Add-ins | Microsoft Learn

At the same time, there is currently a known issue related to Teams:

Users whose alias contains non-ANSI characters may be unable to launch the Microsoft Teams desktop application.

You can refer to this issue in the Admin Center using ID: TM1311440.

Please check whether the affected user has non-ANSI characters in their alias.

I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this.

Thank you for your patience and your understanding. If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.

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I look forward to continuing the conversation.If the answer is helpful, please click "Accept Answer" and kindly upvote it.

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