The Summarize Data Wizard uploads historical telephone system data to the SQL database for a specific date range.
If you run a report and notice that data for a particular device is missing from the report output, verify the device is programmed in the telephone system and in the YourSite database. If you determine the device is missing from the database, add it to the database and use the Summarize command to update MiContact Center Data Collection Service and the SQL database with the complete raw telephone system data (stored on the local hard drive). You can then produce reports on the device.
If data exists for an employee who was previously licensed but is currently unlicensed, that data can be accessed in reports. However, if a summarization is done after the employee is no longer licensed, there is a risk that the statistics currently calculated for the employee could be lost. Relicensing the employee and performing a summarization will restore the statistics.