Redirect messages in queue to another server

I was working with a customer who changed some TLS 1.0/1.1 setting on their Exchange server that broken mail flow to Exchange Online. They were in the process of migrating to Exchange Online from their four server Exchange DAG. I found that two servers were unable to send messages to the Edge server and then Exchange Online:

421 4.4.2 Connection dropped due to Socket Error Attempted failover to alternate host, but that did not succeed. Either there are alternate hosts, or delivery failed to all alternate hosts.

In this situation I was able to place the server component Hub Transport in maintenance mode by running:

Once the component was in maintenance I was able to redirect the message to a working server and have them delivered:

Leave a Reply

Your email address will not be published.