Hi @IBN
Teams can automatically start the update process (depending on the policy) or users can manually check for updates by going to the ellipsis (...) menu next to their profile picture and selecting Check for updates. Both methods use the following sequence of events. For more details about its update process, you could refer to:
Install the update. : There are multiple ways to start Teams. The system automatically starts Teams when a user logs in or you can start Teams through a shortcut. In this step, Update.exe checks for the presence of the staging folder, verifies the content again, and performs file operations to un-stage the app. The old application folder in %LocalAppData%\Microsoft\Teams\current is backed up to %LocalAppData%\Microsoft\Teams\previous and the stage folder is renamed to current. Failures at this step are logged in %LocalAppData%\Microsoft\Teams\SquirrelSetup.log.
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