I have a Exchange 2010 SP2 test environment. All base servers are WS2008 R2 SP1 and all exchange installs were clean SP2.
Every thing seemed fine until I tried to setup a DAG. Regardless of what I try when creating the DAG an 'unacceptable witness server name' error is returned.
The FQDN of the witness server is correct ( 30242v12.corp.30242.local ). This server (one of the hub servers) is ping-able from all member servers and all DNS entries seem correct.
Any ideas anyone?