email delivery problems when i joined my exchange 2000 server to exchange 5.5 site (Full Version)

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don_medina -> email delivery problems when i joined my exchange 2000 server to exchange 5.5 site (20.Mar.2007 9:05:36 AM)

Hi,
 
I've finally gotten approval to migrate my old NT 4 domain and Exchange 5.5 to Windows 2000 AD and Exchange 2000. I'm currently doing my migration tests on a sandbox environment.
 
Here's my sandbox environment for my Exchange 5.5:
1. PDC running Exchange 5.5 SP4 belonging to SITE_A
2. BDC running Exchange 5.5 SP4 belonging to SITE_B
3. SITE_A and SITE_B are connected via a site connector
4. Directory replication running between SITE_A and SITE_B
 
I've set up my Windows 2000 server as my DC and have completed the following:
1. Migrated my NT users defined on SITE_A to an EAST OU on my domain
2. Installed Active Directory Connector from Exchange and configured a two-way RCA between my Windows 2000 domain and my SITE_A Exchange 5.5 site.
 
Everything's running well up to this point. My old NT users can now login using their AD accounts and access their mailboxes running on Exchange 5.5.
 
I then installed Exchange 2000 on my DC and joined it to the SITE_A Exchange 5.5 site.
 
From Exchange 5.5's Exchange Administrator, I can now see my Exchange 2000 server. From my Windows 2000 AD users and computers, I can now perform  Exchange Tasks --> Move Mailbox. Prior to moving mailboxes from Exchange 5.5, my SITE_A users can send and receive e-mails from my SITE_B Exchange site. After moving mailboxes from Exchange 5.5 to Exchange 2000, my users can no longer send e-mails to any users on Exchange 5.5 from both SITE_A and SITE_B.
 
I'm sure I missed some key configuration step. What did I miss?
 
Thanks in advance!




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