Server Manager shows offline for healthy member server

Scenario

A member server is online and reachable, but Server Manager insists the target is offline or unmanaged.

Recommended Resolution Path

1. Verify WinRM, firewall rules, and DNS/SPN health for remote management.
2. Check whether the server was renamed or rebuilt without updating management references.
3. Test PowerShell remoting directly for clearer errors.
4. If only management is broken, avoid overreacting as though the workload itself is down.

Technician Notes

Document what changed, what confirmed the fix, and whether the issue points to a broader standards gap worth addressing for the client.