A variety of tools and resources are available for diagnosing problems, and the event log, server and client logs, and MMC diagnostic tools, such as the Office Communications Server Logging Tool and Snooper, all make diagnosing problems easier than it was in the past. Note that it is highly recommended that you check the event log before starting a diagnostic session. The problems that the event log identifies often point out exactly what needs to be done without any additional work. For more information about how to put these tools and resources to work, see Chapter 21, which describes generic and specific troubleshooting steps for various scenarios.