http://www.exchange-genie.com/2009/04/database-availability-group-dag-exchange-2010/
http://technet.microsoft.com/en-us/library/dd298065.aspx#Cr
http://www.msxfaq.de/e2010/dag.htm
Entferner eines Servers aus der DAG Configuration:
Remove-DatabaseAvailabilityGroupServer -Identity DAGNAME -MailboxServer SERVERNAME -ConfigurationOnly
DAG BACKUP
http://blogs.technet.com/b/ehlro/archive/2010/02/13/backup-issues-and-limitations-with-exchange-2010-and-dag.aspx
http://bestemailserver.net/configuring-microsoft-exchange/exchange-server-disk-failures-with-event-id-51-and-57