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Exchange 2010 CAS Role

Posted on 2011-09-09
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Last Modified: 2012-08-13
When Accessing mailbox using MAPI client [Outlook] or sending email using MAPI client [Outlook], I wonder if Outlook needs first to go through CAS Role or straight to Mailbox server role .

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Question by:jskfan
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by:stefor
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In Exchange 2007 and 2010 you need the Client Access Role to access the mailbox. You will also need the Hub transport role to send e-mails.
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by:jskfan
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Akhater earned 334 total points
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in Exchange 2007 MAPI connections will be to the mailbox server, in exchange 2010 MAPI connections are done to the CAS servers.

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by:jskfan
ID: 36512300
Microsoft Link I posted above, talks about the client that goes through CAS server, I have not see MAPI client (Outlook). it looks like it is used as the old Front End Server.
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by:Akhater
Akhater earned 334 total points
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Again in exchange 2010 ALL CLIENTS access is through the CAS including MAPI (exception is the public folder access), it is now a complete 3 tiers technology.

In exchange 2007 MAPI clients will connect to the Mailbox server directly all other clients to the cas (like the old FE server)

If you are having a hard time believing me read this
http://www.msexchange.org/articles_tutorials/exchange-server-2007/planning-architecture/uncovering-new-rpc-client-access-service-exchange-2010-part1.html
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by:jskfan
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