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For better research, please provide more details about this case:
Do other users in your organization have the same problem?
Are there any other tips or error codes?
What is your Outlook client version? Make sure to update to the latest version.
Here are a few steps you can try to resolve the freezing problem:
- Make sure you have a stable and high-speed internet connection.
- Investigate possible issues caused by add-ins. Press the Windows logo key + R to open a Run dialog box. Enter Outlook /safe, choose a profile if prompted, and then select OK.
- Repair Office. Type Control Panel in the search box at the bottom of the Windows screen.>>Select Uninstall a program from the Programs group.>>In the list of installed programs, right-click the entry for your Microsoft 365 installation and then select Change > Online Repair.
- If the above methods still don't help, please create a new Outlook profile. https://support.microsoft.com/en-us/office/create-an-outlook-profile-f544c1ba-3352-4b3b-be0b-8d42a540459d.
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