Temporarily stop intra site mailflow in Exchange

exchangeexchange-2010

Say I have two Exchange 2010 servers in two different sites, part of the same domain. All mail comes into site A and Exchange transports mail intended for mailboxes in Site B automagically.

How can I temporarily stop the flow from A to B with A queueing up the messages that are going to B so that I can release them again as soon as I've done what I need to do on site B?

I'd like site A to be unaffected.

Best Answer

On Exchange for Site A:

In Exchange Management Console, select Toolbox and there start the Queue Viewer. The Queue Viewer is in Messagedeliverytools. Find the queue for Site B, select it and click on Suspend in the right pane.

When your work on Site B is done, you can just click on Resume here.