After you add servers with Kerberos authentication, the servers might not be found because they are not added correctly.
When you try to connect to a server, the server is not found in Kerberos database.
No valid credentials provided (Mechanism level: No valid credentials provided (Mechanism level: Server not found in Kerberos database (7)))
This error might be caused by domain or mapping problems, or because of a DNS problem where the service principal name is not built correctly. Kerberos authentication does not workwhen the destination is an IP address.
When you add a PowerShell host using the Kerberos authentication type a DNS or NetBIOS destination.