Hello, In our environment (2008 R2 AD) we have an Exchange 2010 setup in a VM with a domain for real world testing purposes. Now we need to proceed to a full production installation of 2 Exchange 2010 in 2 WS 2008 R2 Enterprise for DAG. We need to decommission somehow the first -testing- server. Besides shutting it down, will the installation of the 2 new servers have issues with the old (because of AD schema changes)? Best regards KostasKostas Backas-Systemgraph Technologies

You should uninstall your test Exchange servers before installing the production installation http://technet.microsoft.com/en-us/library/ee332361.aspx If you don't uninstall the test servers first your production Exchange servers will think the test ones are still around Regards,

Thank you very much. I will proceed and post back if needed. Best regards KostasKostas Backas-Systemgraph Technologies