We have Exchange 2007 installed and are now running into a problem with Outlook Anywhere when we introduced new 2012 Domain Controllers.

I have ran the outlook anywhere tests from the Micorosft site and run into a failure when the MAPI Address Book test occurs. It will complete fine when it connects to a 2003 domain controller, but not the 2012 domain controllers.

I have confirmed I get the right response form the 2012 domain controller when I telnet to port 6004. I confirmed there is no ipv6 on any of the servers and I can ping the netbios name and FQDN of the server from the CAS server. There is no firewall in between the machines

Please see the results returned.

The server returned by the Referral service: DC2K1201.domain.local

Elapsed Time: 1280 ms.

Testing the MAPI Address Book endpoint on the Exchange server. An error occurred while testing the address book endpoint. Additional Details Elapsed Time: 3116 ms. Test Steps Attempting to ping the MAPI Address Book endpoint with identity: DC2K1201.domain.local:6004. The attempt to ping the endpoint failed.

Reason :- RPC_S_SERVER_UNAVAILABLE error (0x6ba) was thrown by the RPC Runtime process.

Hi There,

Can you please check this blog and see if this helps you.

http://blogs.technet.com/b/exchange/archive/2008/06/20/3405633.aspx