To install Exchange Server 2013, the forest functional level must be at least Windows Server 2003 native. Forest Level Not Win2003Either Active Directory doesn't exist, or it can't be contacted. Cannot Access The Exchange Server setup operation didn't complete.
More details can be found in Exchange located in the :\Exchange Setup Logs folder.
After this operation, you will not be able to install any Exchange 2007 servers. No E12Server Setup will prepare the organization for Exchange 2013 by using ' Setup /Prepare AD'.
No Exchange 2010 server roles have been detected in this topology.
Run setup with the /prepare AD parameter on a computer in the domain and site HQ, and wait for replication to complete.
See the Exchange setup log for more information on this error. Ad Init Error The forest functional level of the current Active Directory forest is not Windows Server 2003 native or later.
This week one of the servers we wanted to upgrade with Exchange server 2013 CU5 failed during the prerequisite analysis.The server was running Exchange server 2013 SP1 also known as CU4.