X7 CAS in different AD sites

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Del - 24 Jan 2007 01:56 GMT

You must deploy the Client Access server role in each Active
Directory site that contains or will contain a Mailbox server.

Lab testing confirms that a CA in one AD site and will not service a x7
mailbox server in a different AD site. So are we missing something here,
or how do we use one URL and access the correct site CA servers?
With legacy x3 we had two Admin and two routing groups/AD sites, all the ISA
and FE's were in one Admin/Routing Group and AD site. The FE's would
services all Mailbox servers from all Admin/Routing or AD sites.

If we have two large AD sites with CA's and Mailbox servers , are we going
to need 2 seperate ISA+ CA's and then seperate URL's to access the correct
AD site CA/Mailbox servers?

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Mark Arnold [MVP] - 24 Jan 2007 14:01 GMT

>You must deploy the Client Access server role in each Active
>Directory site that contains or will contain a Mailbox server.
[quoted text clipped - 9 lines]
>to need 2 seperate ISA+ CA's and then seperate URL's to access the correct
>AD site CA/Mailbox servers?

From one of the Exchange 2007 presentations.... If you come in from
(say) the Internet and hit a CAS you will be forwarded to the CAS that
is in the site in which your mailbox resides, then your mailbox will
be delivered.
You only need one ISA, one Cert and the one CAS at the permiter as
well as the CAS in your AD/Mailbxo site.

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Del - 24 Jan 2007 16:10 GMT

Mark, that sounds reasonable and we'd expect x7 to work that way. In our
Lab we can't use a CA in different AD siteA to access a mailbox in Site B.

Here's the IE message...received after entering credentials.
Outlook Web Access is not available. If the problem continues, contact
technical support for your organization and tell them the following: There
is no Microsoft Exchange Client Access server that has the necessary
configuration in the Active Directory site where the mailbox is stored.

Sites A and B both have CA's and Mailbox servers.

Thanks

>>You must deploy the Client Access server role in each Active
>>Directory site that contains or will contain a Mailbox server.
[quoted text clipped - 17 lines]
> You only need one ISA, one Cert and the one CAS at the permiter as
> well as the CAS in your AD/Mailbxo site.

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Mark Arnold [MVP] - 24 Jan 2007 16:26 GMT

And don't take this the wrong way but you have double checked the AD
Sites & Services and Subnets to make sure? Yes, yes, I know, but you'd
be amazed....

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