I am in the process of moving all of our users from one DAG to a brand new DAG. This was done unexpectedly and the users in the old DAG cannot access email except for through Outlook (We have many OWA and Mac users).
My issue is that some users in certain databases move very quickly (20 mins) and others move exceedingly slowly (1 day 10 hours for a 400mb mailbox). This has really been an issue since most of the slow moving users are administration.
The slow moving users show a status of StalledDueToWriteUnknown from time to time and I will often see a few hours in the state when looking at their full move request statistics. This is confusing as many of these databases are moving from the same source and destination server. Can anyone clarify why they would enter that state and if there is anything I can do to help the process?