Teams supports the ability to allow selected users to enable Public Preview features in the desktop and browser clients for an early view of functionality. You’ll need to create a new update policy in the Teams admin center and assign it to the people you want to access public preview. It’s all very easy and very useful, which is nice.
Teams supports the ability to assign policies to up to 5,000 users with background jobs. This makes it much easier to assign new policies to large groups of users. Unless you like writing your own PowerShell scripts to handle Teams policy assignment, this is definitely something that all Teams administrators need to know about.