Microsoft exchange 2010 client access role

how can I configure the client access roles array in Microsoft exchange 2010 so that it will not prompt the user id and password during the fail over.
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Nothing to confiugre : it should not ask anything ;)

What is your current configuration :
How many servers, their names and IPs, the CAS Array name, are other roles on the servers, are they under the same AD site (they should), and so on.

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CAS arrays are created when you have more than one CAS server in the same AD site they are created using the following

New-ClientAccessArray -FQDN -Name ""

You also need to add in your local DNS an A record for pointing to the NLB ip of your CAS servers
jobby1Author Commented:
Do we need to configure NLB? How can we configure NLB for CAS.
yes you need to do NLB for the CAS servers or else how can I share the same IP?

for NLB this is a video who will walk you through how to get start with it just follow the NLB part of it

Keep it unicast not multicast

also note you need 2 NIC on each CAS so the CAS servers should have a private network between each others for heartbeat

here is another tutorial covering it in details
Be carefull: Don't set any NLB if your CAS roles are on the same server than the Mailbox role. That's not supported.

that's also an article to the cas array configuration :
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