Check the connection details using the Spotlight Configuration Tool
Open the Configuration Tool. You will find the Configuration Tool on the desktop of the computer where Spotlight Cloud is installed. Double click the desktop icon.
Hyper-V Server address
Check the address is a valid IP address or hostname of the Hyper-V server.
Authentication
When Use Diagnostic Server credentials is selected then the account running the Spotlight Diagnostic Server is used to connect to the Hyper-V Server. Ensure the Windows user running the Spotlight Diagnostic Server can access the Hyper-V Server.
If you select to fill in the user and password fields, verify the user has at least a read-only role.
Hyper-V Server availability
Verify the Hyper-V Server is available and accessible over the network. Verify TCP port 135 is open.
The alarm will clear automatically if the error is due to the service being down or network problems and the error condition goes away.