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Is it possible/Any benefit to have a CAS ONLY at branch site?

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Is it possible/Any benefit to have a CAS ONLY at branch... - 12.Jul.2013 1:43:41 PM   
mattssi

 

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The thought being it would make the client (Outlook RPC) experience better/faster. However, I don't believe this is possible/supported. For instance, if I place a CAS at site B and set the rpcclientaccessarray on the database, would the clients use this instead of the the CAS at site A (the datacenter). Clients are in site B.

I can't find anyone who has done this, but it seems like a reasonable question.

Thanks!

< Message edited by mattssi -- 12.Jul.2013 6:12:37 PM >
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RE: Is it possible/Any benefit to have a CAS ONLY at br... - 12.Jul.2013 5:00:44 PM   
de.blackman

 

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Even if you place a CAS in SiteB without a mailbox role, Exchange will redirect all requests over to the CAS server in SiteA. Exchange is "smart" in that it knows which AD site you place it in and will know how to locate a mailbox.

http://technet.microsoft.com/en-us/library/bb310763(v=exchg.141).aspx

http://blogs.technet.com/b/exchange/archive/2011/12/12/owa-cross-site-silent-redirection-in-exchange-2010-sp2.aspx

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(in reply to mattssi)
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RE: Is it possible/Any benefit to have a CAS ONLY at br... - 12.Jul.2013 5:43:32 PM   
mattssi

 

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Thanks for the reply.

In the redirection/proxying, it never refers to MAPI/RPC as far as I can tell. What would happen if the RPCClientAccessServer is specified as the CAS in Site B?

(in reply to de.blackman)
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RE: Is it possible/Any benefit to have a CAS ONLY at br... - 14.Jul.2013 5:00:02 PM   
de.blackman

 

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It wouldn't make a difference and I actually think it'll reduce performance if you do it like that because you are going to be redirected from the redirection.

The point i'm trying to make is what you want to do will not really improve performance unless you actually put a mailbox server in the SiteB. The redirection is regardless of the protocol in use (MAPI or RPC).

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Ibrahim Benna - Microsoft Exchange MVP
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@IbrahimBenna

(in reply to mattssi)
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