Performance analysis and troubleshooting can be a very complex and daunting area with Exchange Server. Being able to quickly and accurately identify and resolve issues requires a thorough understanding of the most interesting and important performance counters. With the July content refresh we've just released new content detailing these counters and many of the important thresholds to be aware of. The content is broken out by counters that are common across Exchange roles and counters that are specific to each role. A big thanks goes to Mike Lagase, John Rodriguez, and Scot Landry for their help in pulling all of this information together.

More info: Monitoring Without System Center Operations Manager

Source:→ Microsoft