For those users who have already made the switch by simply clicking on the ‘Yes, go to new Teams’ button (as shown below), but have experienced issues with this new version of Teams, then we highly recommend that you conduct an uninstall of the classic version. Then download and install the new Microsoft Teams client from Microsoft O365 (you will need admin privileges to do this). We have found that switching to the new Microsoft Teams client this way, resolves various common reported issues.

Click below for more information on end of availability for Microsoft classic Teams client and guidance on deploying this: