Hi,
We have Exchange Server 2013 CU5 environment, TWO mail box servers and Two Client access servers . While configuring OutLook any where with server name and Mailbox name it does not work , error is Exchange server is not online . If I configure with Exchange GUID (Ex: Exchange GUID@domain.com ) and user mailbox name it works fine . I could not see any errors in testconnectivity.Microsoft.com.
Could you please help me to resolve the issue . let me the know possible causes for the issue.
Regards, Srinivasu.Muchcherla