| Issue | Solution | |-------|----------| | .res file rejected | Ensure request/response match same license server ID and serial number. | | Agents show unlicensed | Restart Acronis Managed Machine Service on agent. | | License Server shows no licenses | Check system date/time – if off by too much, activation fails. | | Cannot access web UI | Ensure acronis_license_server service is running and firewall allows port 8081. |