Teams not updating

Darren007 I guess that the manual update process in Teams doesn't work either? (Click on profile picture and select Check for Updates).

The automatic update should run 15 minutes after a user signs in to Teams. If there is an available update it should be downloaded and wait until Teams app been idle for 30 minutes. When the update is installed it will ask the user to restart Teams client. 

When a automatic update is installed it will not update again for a week (or if it was 5 days).

The first URL that your Teams client tests is https://teams.microsoft.com/desktopclient/update/<currentversion>/windows/x64?ring=general to see if there any updates available. Then it will get a download URL to the exe from here:

https://teams.microsoft.com/desktopclient/installer/windows/x64

And lastly download the installation file from here:

https://statics.teams.microsoft.com/production-windows-x64/<latestversion>/Teams_windows_x64.exe

So check if your Windows machine is able to reach those URLs, if not check if there is something blocking access like a firewall or proxy.