I'm having an issue with some macbooks I recently put out with OS Seirra on them. I have set up the accounts to be both mobile and managed and it looks like that is working fine. If the macbooks are not used for a while and the screen goes blank, when the user attempts to re-login with the same password they are told it is incorrect. If you force the macbook to shutdown and restart, you are able to log in once again. These are Active Directory accounts.
I'm wondering if anyone else has seen this issue.
Yes, it's not strictly related to iCloud. That was just the original topic of the thread. If you can get on the beta for 10.12.3 to test, you'll find out for sure if that helps you. However, the production release of 10.12.3 will probably be out very soon.