Friday, April 3, 2009

Exchange 2007 POP/IMAP between Active Directory sites .. with solution!

As a follow up to the previous post, Pop and Imap can work between sites as well. The referenced paper says they can't, but it is incorrect.

To enable Imap between a CAS server and Mailbox server in 2 separate AD sites, edit this file
C:\Program Files\Microsoft\Exchange Server\ClientAccess\PopImap\Microsoft.Exchange.Imap4.exe.config

and change this line to true.
<add key="AllowCrossSiteSessions" value="false" />



POP3 is eerily similar.

To enable Pop3 between a CAS server and Mailbox server in 2 separate AD sites, edit this file
C:\Program Files\Microsoft\Exchange Server\ClientAccess\PopIma\Microsoft.Exchange.Pop3.exe.config

and change this line to true.
<add key="AllowCrossSiteSessions" value="false" />



Note to Microsoft: A quasi-legible text based configuration file. Thank you!

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