I had a situation recently where one of my Exchange servers started denying connections due to back pressure hitting a threshold. I noticed the Exchange MP didn’t catch this and I was wondering if anyone has come up with a clever way to catch this before it stops transport connections. I can of course have SCOM watch for the events but that’s more reactive. I’d prefer to get a notification when the disk space (for the threshold) is reaching it’s limits. In case anyone is unaware how this works, you could have an Exchange server with 50 gb free on the main binary volume but the size of the submitted messages waiting to be processed can reach it’s limit.