The SubmissionServerOverrideList...

  • Article

Obviously we all know that Link State is going and E2K7 bases its routing decisions on your AD site topology.  Generally I think this is a huge step forward but there will be occasions where our preferred AD site design is not the most efficient for routing emails.  In that case the following might be of interest...

You can configure a mailbox server to use specific hub transport servers that reside in the same AD site.  The way you would do this is through the following command in Powershell:

Set-MailboxServer -Id: mbxserverA -SubmissionServerOverrideList: htserverB,htserverC

The use of the hub transport servers is on a round-robin basis but bear in mind that if all the HT servers in the list are unavailable there is no logic to fail back to any other HT server so routing will fail.