Calendar not syncing with Teams from September 2025

From September my Calendar is not syncing with Teams calendar but is still working for my iphone. Whilst this has happened previously over the years the way I used to fix this is not working any longer. So something has changed recently.

My most recent fix that has worked many times has been:

1. Quit Microsoft Teams.
2. Open Finder and press Command+Shift+G OR Open Finder > Go> Go to Folder

~/Library/Group Containers/UBF8T346G9.com.microsoft.teams

1. Select contents of folder (Called Library) and move to Trash
2. Repeat for ~/Library/Containers/com.microsoft.teams2 (called Data)
3. Restart device.
4. Relaunch Microsoft Teams.