Hi @K B ,
Thanks for visiting Microsoft Q&A forum.
As I know, there might be several factors which could cause Outlook for Mac Freeze issue. In order to eliminate interferences from known issues, please make sure you have updated you mac OS and Outlook to the latest version.
There could be some add-ins in your Outlook that cause this issue, so it is suggested to try to temporarily disable your Outlook add-ins and restart your Outlook to test and see if the issue has any difference.
Besides, a corrupted profile can also lead this issue. So, please try creating and using a new Outlook profile and see if there is any difference.
For more information, please check this article: Outlook for Mac Not Working: Freezes or Crashes, Fix. (Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)
Hope this can be helpful.
If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.