With Exchange Server 2010 SP1, several scripts came available for High Availability actions.
- Suspends Mailbox Database Replication
- Pauses High Availability Node
- Sets the DAG node on blocked
- Movel databases to other nodes
You can use this script to safely upgrade operating system or Exchange Server (rollups or service packs)
After the maintenance process is done, you can execute stop script.This script resumes mailbox database replication and remove DAG node from being blocked.
This script includes metrics for continuous replication , block mode, replay pipeline.
With using this script, you can balance your database copies across a DAG.Each server in DAG will have an equal number of mounted databases.