Exchange 2010 on LTM v11

Hi YB-

Did you remember to create a Client Access Array on your Exchange servers? If you have more than one Client Access server *or* the published FQDN is different than the hostname of your single server, this is required. (Microsoft recommends you create a Client Access Array all the time.)

We cover this briefly on page 20 of the v11 deployment guide and page 16 of the v10 guide.

From the Exchange Management Shell, run this command to see what you've configured:

Get-ClientAccessArray 

In one of my test environments, for instance, I get these results:

Name                Site                 Fqdn                           Members
----                ----                 ----                           -------
Array1              Seattle              outlook.exchange.local         {SEACA00, SEACA01}

This shows I have an array named 'Array1' that contains the servers SEACA00 and SEACA01. Importantly, it also shows the FQDN I've assigned; that's the FQDN that will get returned to the clients (rather than the hostname of either of the individual servers).

If you haven't created a Client Access Array, do this:

New-ClientAccessArray -Name "arrayname" -FQDN mail.example.com -Site "sitename"
 

"arrayname" is any identifiable name you want to give the array; sitename is your AD site (you can only have one Client Access Array per AD site). Make sure to put your own FQDN in place of mail.example.com

Then, since you have previously initialized your mailbox databases, you'll need to associate them with the array (any databases you add after creating the array will become part of it automatically). To associate the existing databases with the array, do this:

Get-MailboxDatabase | Set-MailboxDatabase -RPCClientAccessServer mail.example.com
 

Make sure you specify the same FQDN that you used when establishing the array.

(I'm not sure if you need to restart any services at this point, but I don't believe you do.)

And that should be it! Give it a try and let us know how it works for you.