Changing CAS hostname for Outlook clients
We're in the midst of migrating from ex2003 to ex2010. Things are going smoothly and we've moved over a couple of test mailboxes from our 2003 environment and are getting ready to migrate the bulk of our mailboxes starting this weekend. We have had a long standing issue with our Outlook clients not wanting to connect to the Exchange server in some situations while using our VPN. The reason for this is that when we first deployed active directory many moons ago, the setup wizard chose our old NT4.0 domain name and appended a .com to the end and we ran with it. The bad news for us is that this is a real public domain that we don't own, so when our client computers get out in the wild, they will sometimes fail to resolve internal IP addresses. That all being said, I thought I might be able to kill 2 birds with one stone during the migration to ex2010. My question is: Can I configure it such that my Outlook clients will use the same hostname for the CAS that I am using for ActiveSync, OWA, etc.? If so, how do I go about configuring this?
January 19th, 2012 10:23am

Hello, Maybe you can deploy CAS array. http://techdom.nl/microsoft/howto-install-configure-exchange-2010-sp1-cas-array-network-load-balancing-nlb/ Best Regards, Lisa
Free Windows Admin Tool Kit Click here and download it now
January 20th, 2012 2:01am

A CAS Array would probably work here, as already stated, but it would have to be a different host name to what you are using already. Microsoft recommend that the CAS array name is unique, and does not resolve externally. This can cause problems with the operation of Outlook Anywhere for example. Therefore I would suggest that you setup a unique host name for the CAS array - outlook.example.com and leave the names you are using for everything else as they are. Ensure that you don't have a wildcard in the domain on your public DNS so that outlook.example.com does not resolve anywhere. It will not be 100% perfect, because there will still be internal references to the domain controllers for example, but it should work. Simon. Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.
January 22nd, 2012 7:43am

This topic is archived. No further replies will be accepted.

Other recent topics Other recent topics