When updating your license files, after restarting the Protection Engine service, you check your logs to validate functionality, but you see the multiple errors regarding License Error report for RESULT_INVALID_AV_UPDATES_LICENSE and RESULT_INVALID_AV_SCANNER_LICENSE.
The SSE-CSAPI-License.slf may have been moved.
Copy this file back in to the Licenses folder for your operating system and restart the Protection Engine service.
If you have lost this file, you can copy it from any other Protection Engine installation.