Symptoms
When you configure MDM Link, it fails with error Applying configuration settings... Failed. The underlying connection was closed: the connection was closed unexpectedly:
Cause
PMM Proxy can't connect to the MDM server over the service port.
You can verify it using PowerShell command Test-NetConnection MDM_sever_public_FQDN -Port ServicePort , where
MDM_sever_public_FQDN is the public FQDN of the MDM server you specified when configured MDM component;
ServicePort is the port used for incoming Parallels Mac Management connections.
It must return TcpTestSucceeded : True, otherwise, the connection is blocked.
Resolution
Adjust firewall settings to allow incoming TCP connections from PMM Proxy to the MDM server public FQDN over the service port.
Was this article helpful?
Tell us how we can improve it.