We are running Exchange 2010 SP3 U8. We have our databases in a DAG. we are building another site and the best way for us to get the copy to the new site is to dismount the DB and then copy it manually to a volume that is replicated to the new site. while the DB is dismounted for some reason all users of iPhones loose ActiveSync on their mobile device and cant get mail updates.
The error in the logs is eventid 1016 Source: MSExchange ActiveSync
Exchange ActiveSync has encountered repeated failures when it tries to access data on Mailbox server [xxx.xxx]. It will temporarily stop making requests to the Mailbox server for [60] seconds to reduce load on that server. This delay may occur if the Mailbox server is overloaded. If this event is logged frequently, review the Application log on this server and the Mailbox server noted above for other events that could indicate the root cause of performance problems.
Any ideas would be great.