POP3 mail delivery with SBS2003/Exchange

sbs 2003 pop3 connector for Exchange 2003 does not deliver to user mailboxes. I set recipient policy to include the POP3 servers as non-authoritative SMTP domains and are checked. The Active Directory user email addresses have the POP3 addresses defined. The POP3 connector successfully retrieves email from the servers but it doesn't appear in any mailbox. I even used the troubleshooting option of directing it to a particular mailbox (administrator or my own) but that doesn't seem to do anything. What am I missing?
fredtoddAsked:
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Hypercat (Deb)Commented:
Are you sure that you have the POP3 Connector properly configured?  You should not have anything configured in the RUS.  The email addresses in AD should show only the internal email addresses being used, not the POP3 addresses.  You need to configure the POP3 Connector itself with the proper information to forward the email from each external address to the corresponding internal address.  

Here's an article about troubleshooting the SBS POP3 connector - the information about logging is particularly helpful, as it allows you to see in detail in the event logs exactly what is going on:

http://support.microsoft.com/kb/885685/en-us
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fredtoddAuthor Commented:
The knowledge base article was very informative. Oddly, however, something I had already done had fixed the problem. That is applying update KB835734 and restarting the server did it. Or at least one of those two did it.
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Computer101Commented:
PAQed with points refunded (250)

Computer101
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