: Use netstat -ano | findstr :[port] to see if other software is interfering with SEPM's web server components. Recommended Troubleshooting Steps
: Open services.msc and ensure the Symantec Endpoint Protection Manager and Symantec Embedded Database (if using the default) are both "Running." Restart them even if they appear active. Symantec endpoint protection manager unexpected server error
: Another application might be using port 8443, 8081, or 9090. : Use netstat -ano | findstr :[port] to
: Run the Management Server Configuration Wizard (located in the Start Menu under Symantec Endpoint Protection Manager). Select "Reconfigure the management server" to refresh the connection credentials and settings. Symantec endpoint protection manager unexpected server error