Server Manager cannot manage one host because WinRM listener missing

Scenario

Remote management works broadly, but one Windows Server loses manageability because the WinRM listener is absent.

Recommended Resolution Path

1. Check WinRM configuration and service state directly on the affected host.
2. Review firewall rules and whether the machine was recently hardened or rebuilt.
3. Test PowerShell remoting from a management server for clearer diagnostics.
4. Restore the listener intentionally rather than disabling management security wholesale.

Technician Notes

Capture the exact scope of impact, confirm which dependency failed first, and document whether the issue reflects broader domain or server drift.