Exchange general question

Hi Guys ,

From what I know internal users(outlook) in exchange 2003,2007,2010 are connected directly to the mailbox server.

I have installed exchange 2013 and  it seems that the internal users(outlook) has to connect to CAS right now.

Can some of you tell me the difference?

please , can you provide for me the port and protocol that internal outlook users uses to connect mailbox server internally.

 

Thx ,
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Moti Mashiah.NET DeveloperAsked:
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ReceptConnect With a Mentor Commented:
Your observations are correct; with Exchange 2013 the internal clients are actually connecting to the CAS server which acts as a proxy rather than directly to the Mailbox server.

Some reading on the subject;
http://blog.exchange-addict.com/2012/08/ehlo-i-am-exchange-2013cas-role_1.html
and
https://michaelvh.wordpress.com/2012/07/24/a-closer-look-at-the-changes-in-the-client-access-infrastructure-in-exchange-server-2013/
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