Starting with the 1605 release, the Customer Usage Data report is set to 90 day limitation history.
SuccessFactors Learning Management System (LMS) - All Supported Versions since b1605
This change was made to ensure the queries would not timeout by reaching the thresholds set.
If older data is required, then the report must be ran with a specific set timeframe using the date search fields provided.
Customer Usage Data, 90 days, b1605 , KBA , LOD-SF-LMS-REP , Reporting Data , Problem