We are running an Exchange 2003/2010 environment with one back-end EX2003 and one CAS/HUB/MBX 2010 server. None of the 2003 mailboxes have been migrated. I created a mailbox on EX2010 and tried running the ExRCA Outlook Anywhere (RPC over HTTP) for the EX2010 mailbox user. If I choose "Use Autodiscover to detect settings", the test fails with the following error:
Testing NSPI "Check Name" for user email@example.com against server SERVER.domain.internal.
An error occurred while attempting to resolve the name.
The name could not be matched to a name in the address list.
Do you have any suggestions?