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Exchange 2010 CAS HA

Hi everyone, i am a bit confused here. We have 2 CAS servers, both are a part of Windows NLB. But our Outlooks point to one CAS server at a time. I had my account on CAS02 and I shutdown CAS02 just to test and my Outlook couldnot work and it didnt go to CAS01 automatically. I dont see any errors or anything on any of the servers and the NLB is working fine. Any idea what could be wrong ?
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Ben Hart
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CAS array had been setup and configured all fine. But we upgraded from SP1 to SP3 and after that the cas array somehow disappeared. I can still ping it though but I cannot see the A record of it. And the servers and databases are not picking it up. Can I reconfigure it ?
With Exchange, every service pack totally removed the application and reinstalls it.  I had SP2 bombout and bork up one of my servers a few years back. After that I didnt do SP's unless I had to.
Sounds like you need to reconfigure this portion.
The cas array's site is the default-first-site while my exchange servers are at another site. Do you think this would be an issue ? During the upgrade, we also setup a new site for the company and we removed all DCs from our default first site and created 2 different sites for the DCs. There is no DC or exchange server in the default first site. Do you think this could be an issue ?
You should be able to follow that second link and get her set back up.
That's a possibility, can you change the site in Exch?
I got the idea of the site from the 2nd link you sent me. Just need to confirm with you if the site could be an issue ? I can simply change the site by the set-clientaccessarray ?
I believe that's the correct cmdlet, but yes matching the sites is the first thing I'd try.
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Will Szymkowski
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Thanks Will.

We do have 3 DCs on the site 'A' where our Exchange is present currently. But the cas array is on default first site (not site A)

So if I move the casarray to site A, will it start working ?

And I know that NLB is not good but I recently joined this company and the environment was already there. what is the best load balancing option you would suggest ? And how easy it would be to get rid of NLB and join the 3rd party LB without any disruptions ?