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Exchange 2007 Sending Internal E-Mail to Wrong Site

We have multiple Active Directory sites with Exchange 2007 servers in each site. We have a problem where a user in site A is trying to send a message to a user in site B but the message is ending up in the e-mail queue at site 3. The queue viewer on the Exchange server in site three describes it as "smtp relay to remote active directory site." How do we configure e-mails to correctly go from site A to site b without issue? Also, how do we get teh queued messages delivered? More info: this is only an issue for sending from site A to site B. Also, some message from site A do get delivers to site be but it is random. Also, messages from site B are delivered without issue and any site sending or receiving mail to or from the Internet (i.e. other e-mail domains) are delivery without issue. Any ideas?
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inmdhd
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inmdhd
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1 Solution
 
MesthaCommented:
Do you have sites and services configured correctly in AD?
Do you have a hub transport server in each site?
What are the costs between the sites?

-M
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inmdhdAuthor Commented:
Yes, looked at the sites. The connection from site A to site B has a lower cost than the link from site A to site C. Is there something in the Exchange management console that can affect this?
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MesthaCommented:
Exchange 2007 doesn't do routing like Exchange 2003. It uses the domain for routing. Can the servers in those two sites see each other correctly? That would account for it going the long way round.

-M
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inmdhdAuthor Commented:
They can see each other. In AD Sites and Services, the link between site A and site B is lower than the link between Site A and Site C. Also, there is no link defined between site B and and site C. So that still makes me still wonder why mail from site A to site B is trying to send it via site C
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inmdhdAuthor Commented:
I should add that site A is set up as a hub site in Exchange 2007. The other sites are not. I don't know if this provide a clue.
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MesthaCommented:
You should have a hub transport server in each AD site.
Email is passed between sites by hub transport. Hub then delivers the email to the mailbox server.

-M
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inmdhdAuthor Commented:
How does one view the routing tables (other than AD Sites and Services) used by Exchange to determine the lowest-cost route to send e-mail?
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MesthaCommented:
I am not aware that you can - as Exchange uses Sites and Services.

-M
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inmdhdAuthor Commented:
Problem resolution: the subnet for site B was listed as being on the same subnet as site A. I corrected this to resolve the problem.
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