Event logging is not something an end user would have to care about but it may be necessary during troubleshooting problems with Offline Files. Windows Vista has also considerably changed when it comes to Event logging. The Event Viewer includes a new category of event logs “Applications and Services logs” apart from native “Windows Logs”. These logs store events from a single application or component.
To enable "Operational" log by using the Windows interface — Start Event Viewer. (Eventvwr.msc). In the console tree, navigate to and select the “Applications and Services logs”. Select “Microsoft”. Select and expand “Windows”. Select “OfflineFiles” from the list. Select the log “Operational”. On the “Actions” menu, click “Enable Log”. To enable “Operational” logs by using a command line. Open a command prompt in Run as Administrator mode. Type the following text: