troubleshooting Question

421 4.3.2 Service Not Available

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Darren Somthing asked on
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I'm getting ready to migrate to Exchange 2010 from 2003.  I have several virtual machines setup to test the installation.

I have a default install of Exchange 2003.  I have a CAS, HT, and Mailbox servers.  After the install all message are getting stuck in the following queue:

HTserver (Routing Group Connector)

The following error is logged: 421 4.3.2 Service Not Available.

Is there something that must be completed to allow mail flow between the two routing groups?

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