http://blogs.technet.com/b/justin_gao/archive/2012/12/30/you-need-to-know-pre-stage-cluster-name-object-when-your-create-exchange-server-2013-dag.aspxHi All : When you installing Exchange Server 2013 Mailbox High-available on Windows Server 2012 e nvironment , you may encounter this error : An Active Manager operation failed with a transient error: Please retry the operation. Error: The fully qualifieden-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/justin_gao/archive/2012/12/30/you-need-to-know-pre-stage-cluster-name-object-when-your-create-exchange-server-2013-dag.aspx#3543485Tue, 01 Jan 2013 14:03:28 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3543485Justin Gao<p>Hi netgc:</p> <p>Please reference KB947049:Description of the failover cluster security model in Windows Server 2008 <a rel="nofollow" target="_new" href="http://support.microsoft.com/kb/947049">support.microsoft.com/.../947049</a> </p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3543485" width="1" height="1">http://blogs.technet.com/b/justin_gao/archive/2012/12/30/you-need-to-know-pre-stage-cluster-name-object-when-your-create-exchange-server-2013-dag.aspx#3543335Mon, 31 Dec 2012 12:11:51 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3543335netgc<p>why???</p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3543335" width="1" height="1">