My company ran into an issue recently where mobile device management just stopped working out of the blue. One day we were in the Exchange Console and users mobile devices would list under their account and the next it would show that they didn't have anything but their sync was still working. Being the type of company that we are, it was a concern because we weren't able to wipe devices if an employee changed their device or left the company.
After a reboot of the Exchange server; however, the functionality appeared to come back. I've looked through the updates that were installed prior to the reboot / that needed the reboot and it was all related to .NET updates, security updates for remote code execution/IE/USB drivers which shouldn't have affected the Exchange server functionality nor the Mobile Device Management (if I understand correctly how it works).
Can anyone shed some light on the potential reason why it would just randomly stop showing everyones devices (even after trying log off, back on, force MMC process exit, etc. prior to reboot) and then after a reboot everything starts working again. I'm just grasping for a root cause on this one and can't seem to find it.