I have run into a few systems where the encryption client refused to sync up with the server - it gives an error stating user not enrolled, and the client is stuck in not-provisioned.  They are using the same installer and process as dozens of other clients, but for some reason maybe 1 out of 20 or so get this error.

My team reports that once they log in as themselves the encryption will start immediately. 

Any ideas where to look to resolve this so we can avoid running into the problem?

v/r
-Tom