Microsoft has released the preview of an idle session timeout policy to control the automatic sign-out of Microsoft 365 web apps. Not every web app is covered, but those that are will be signed out automatically when one of the covered apps becomes inactive for a stated period in a browser session. At that point, Microsoft 365 signs out all the web apps and forces the user to sign in again. Sounds like a reasonable idea, and it replaces existing mechanisms available for OWA and SharePoint Online.
https://office365itpros.com/2022/03/22/idle-session-timeout-policy/
