How do I remove an old server that is no longer online? I removed it from the authorized devices list, but it still shows up my friends as having access in the Manage Library Access tab and it shows up on their devices (albeit offline).
They need to force their clients to update the list of [shared] servers.
Either by switching User back and forth (only possible if they’re in a Plex Home),
or by signing out of their user account, restarting the device and signing back in.
But the old server will remove itself after a few weeks anyway, so there is no need for this hassle.