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Exchange Server 2007: How to turn off the Back Pressure feature on transport servers
Posted by Bharat Suneja at 2:09 PM
In reference to previous post titled "Exchange Server 2007 Transport: 452 4.3.1 Insufficient system resources", the Back Pressure feature, that detects resource pressure on Exchange Server 2007 transport servers and stops accepting new message submission if low on resources, can be turned off. Here's how to do it:
1. Open the EdgeTransport.exe.config file from \Exchange Server\bin directory using notepad
2. Add the following key+value pair:
<add key="EnableResourceMonitoring" value="false" />
3. Save file
4. Restart Microsoft Exchange Transport Service (MSExchangeTransport)
1. Open the EdgeTransport.exe.config file from \Exchange Server\bin directory using notepad
2. Add the following key+value pair:
<add key="EnableResourceMonitoring" value="false" />
3. Save file
4. Restart Microsoft Exchange Transport Service (MSExchangeTransport)
Labels: Administration, Exchange Server 2007, SMTP
2 Comments:
This is good information, but it really should be stressed that turning off back pressure is not recommended. It is enabled so that Exchange can detect and prevent problems. More information on Back Pressure can be found here:
http://technet.microsoft.com/en-us/library/bb201658.aspx
Certainly, it's not recommended to turn off Back Pressure - it's one of the smarter things Microsoft has done with Receive Connectors (aka "SMTP virtual servers" in previous versions), and the transport.
Back Pressure parameters can be tweaked, as mentioned in the earlier post linked in the above one.
Nevertheless, this comes in handy when you want to turn on transport/message submission asap - as the last option perhaps.
Bharat
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