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Change RPC ClientAccess Server

Posted on 2014-02-15
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Last Modified: 2014-03-13
We have 3 Exchange 2010 servers and each server contain 3 roles (CAS/HT/MBX).
Now we are going to demote 1 server which is currently handling client connections.
Hence, we want to set another servers which can accept all cilent connections (inbound/outbound) in our organization.

Kindly help with articles.
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Question by:sanjayambre
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by:Simon Butler (Sembee)
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There is no automatic way to do this.
What you should have done is configured an RPC CAS Array, and that is what I would tell you to do now.

You can then simply change the DNS entry to point to another server.

As you didn't have a CAS array, the only option you have if you want no downtime and no risk is to visit every client, doing a repair of the Outlook profile.

The way that Microsoft says things should happen is that you remove the CAS role and then Autodiscover SHOULD kick in and direct the clients to another machine. However that is a rather risky approach, you cannot test it and if it doesn't work then you are stuck with trying to repair all of the clients at once.

I have written this article on why you should use a CAS Array:
http://semb.ee/casarray
And this is the TechNet article on configuring it.
http://technet.microsoft.com/en-us/library/ee332317.aspx

Simon.
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by:sanjayambre
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Thanks...can we configured diffrent RpcClienAcess Servers for different databases within the site only which includes three CAS servers & 5 databases.
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Simon Butler (Sembee) earned 500 total points
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No.
RPC CAS Array is AD site specific and you cannot have more than one RPC CAS Array per AD site. Remember the database does not belong to a specific server, so you need to use the same array across all servers in the site.

Simon.
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