This is a general scan engine update or revert error which occurs if the information required to perform a scan engine update or scan engine revert is not available or incorrect.
Causes
1. The scan engine license has expired or the license information is unavailable. 2. The FSCController could not to be notified about the scan engine update. 3. The update path passed to the scan engine update was incorrect.
Resolutions
1. Verify that the Forefront Server Security license has not expired and that the license file exists in the install directory. 2. Restart the Forefront Server Security Services 3. Verify that the update path passed to the scan engine update was correct.