Event Viewer records events for Office Communications Server events on a server that is running Office Communications Server 2007 R2. When enabled in Office Communicator, Event Viewer also maintains logs about program, security, and system events on your client computer. When logging is enabled on a client, Communicator writes the following types of errors to the Windows system event log, along with detailed troubleshooting information:

To enable Event Viewer in Communicator, on the Toolsmenu, click Options. On the Generaltab, under Logging, select the Turn on Windows Event logging for Communicatorcheck box.

For details about Office Communications Server events that you can use to troubleshoot Enterprise Voice issues, see Appendix A: Enterprise Voice-Related Events. For an explanation of common Communicator error messages, see Communicator Error Messages at http://go.microsoft.com/fwlink/?LinkId=143005 .