You can enable a third-party or native
Exchange DAG. This action is the same as the
Enable-EmcExchangeFailover ESI PowerShell cmdlet in that it enables
a failover.
To enable a failover for an Exchange
DAG:
In the left pane of the ESI window, select
Applications > Exchange and the applicable mailbox forest.
In the center pane, select the DAG to
update.
In the Actions
pane, click Enable Exchange Failover.