To allow the Windows Server Update Services to connect to the Microsoft domains for Site24x7 Windows Updates monitoring, ensure that your Windows Server Update Services have access to ports like 80 and 443 on the following domains:
http://download.windowsupdate.com
https://*.windowsupdate.microsoft.com
http://go.microsoft.com
https://*.update.microsoft.com
http://*.windowsupdate.com
https://download.microsoft.com
http://*.update.microsoft.com
http://*.download.windowsupdate.com
http://windowsupdate.microsoft.com
http://dl.delivery.mp.microsoft.com
https://dl.delivery.mp.microsoft.com
http://wustat.windows.com
http://ntservicepack.microsoft.com
http://*.windowsupdate.microsoft.com
As the IP addresses associated with the above domains are arbitrary, ensure that you do not use the IP address ranges.
Ensure that the first Windows Server Update Services server is able to access any URL within the enlisted domains.