I recently uninstalled and reinstall the mailbox server roles on both nodes of a CCR cluster. Now when I try to setup the cluster I get the error message "Exchange Server 'server name' already exists. Restart setup and specify a different name for the clustered mailbox server. Does anyone know what to do about this?

Check the CMS name in ADUC in Computers OU. it creates Exchange CMS name in ADUC under computers OU delete and then try again Vinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

Thank you for the quick response. I've looked all through ADUC and it is nowhere to be found. This is the part that has me confused as I cannot find any reference to the original name anywhere but the setup still says that it exists.

did you checked the name in adsiedit under exchange org? Vinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

That fixed it. Thanks so much.