Question : How do you monitor back pressure in Exchange 2007

How do you effectively monitor back pressure in Exchange 2007 to include realtime low, medium and high levels

Answer : How do you monitor back pressure in Exchange 2007

You can configure performance alerts to let you know if issues arise and the following article describes how to do this:

http://searchexchange.techtarget.com/generic/0,295582,sid43_gci1356103,00.html

I am not aware of any 3rd party application that can provide real-time monitoring.