We have a few users complaining that while actively composing a new email, they are kicked back to a login screen. It also happens if they let webmail go idle for even a minute or two, or if they hit Refresh at any time-- instantly returned to the login screen.
We have screen-shared with them and can verify this is not a user exaggeration, it actually happens just like that.
Yesterday we tested with a user in Edge, Chrome, and Firefox-- all up to date versions. Same behavior happens in all 3 browsers, so we can rule out a browser-specific issue.
Any ideas why, or what can be done to fix?