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!