Additional features, settings, or issues not covered by specific Microsoft Teams categories
Hi PeterJ86,
If so, since based on your former description that Teams folder does not exist, it seems that "/Users/jay/Library/Application Support/Microsoft" directory is owned by "root" which lead to 'Teams' folder can not been created when starting teams application. Please try the following steps to change the ownership of the Microsoft directory to your login id, which is listed in the path after "/Users/", in your case "peterjonson".
Open Terminal app and at the command prompt type the following commands ("peterjonson:" and "root#:" are the ends of the command prompt, you don't type them!) substituting "peterjonson" in all paths below with your login id:
peterjonson: cd Library/Application\ Support
peterjonson: sudo su -
Password: (type the password for "peterjonson" here)
root# cd /Users/peterjonson/Library/Application\ Support
root# chown peterjonson Microsoft
root# ls -lat | grep Microsoft
drwxr-xr-x 4 peterjonson staff 136 Nov 7 17:23 Microsoft
The last output above shows the Microsoft directory is now owned by "peterjonson".
Finally, please close Terminal app and start Teams and check the result.
Regards,
Bryan