HI Reader, We have a problem that the CAS server does not know where the mailbox server is and thus will not connect to the right location. Site A server: Test Working site Site B server: Test failover site Everytime I connect usingOWA, outlook 2007 or outlook anywhere, it tries to connectto site B server , even after deleting ALL mailbox ids and creating new mailboxes in NEW databases at site A. We did failover to site B mailbox server, but now we cannot get the exchange system to accept that the mailbox server is back at site A with new empty mailboxes. This is even for a brand new id & mailbox created at site A, since the problem occurs. Also 'Get-ExchangeServer' gives the SITE of server at site A, to be at site B. How can that be corrected? . I would belive that.......that is the symptom of the same problem. Many Thanks for answers or pointers. S.

Whichhigh availabilityfeature of Exchange 2007 do you use?

Hi, If I am not allowed to mention (or advertiseit) ....it is 7 letters begins with W and ends in c. If that is not obvious then perhaps I shall use the full name.

Was using 3rd party replication. Found and manually amended the site CN= here, Configuration/Services/Microsoft Exchange/Your Organization/Administrative Groups/Exchange Administrative Group (FYDIBOHF23SPDLT)/Servers Seems much better now. Now to fixing the SP1 problems.