Use tools like ping or telnet to confirm that the management ports (135, 5985, 5986) are open between the collector and the host.
Get-CimInstance Win32OperatingSystem
You can manually test the connection from your collector (e.g., FortiSIEM Supervisor) using the omic tool to bypass the GUI and see raw error messages: win32operatingsystem result not found via omi new
: If the WMI repository on the Windows host is corrupted, the Win32_OperatingSystem class may be missing. Run mofcomp cimwin32.mof from C:\Windows\System32\wbem to re-register the core WMI classes. Use tools like ping or telnet to confirm