Hello,
Just to clarify, you'd like for the RutOS device to report its IP address to a Windows server using DDNS package?
If so, we do support custom endpoints for address updates, and you'd need to enter a Custom update-URL, as well as your lookup hostname. Make sure the IP address source is set to Custom and the appropriate WAN interface is selected (mobile, wired WAN, wireless WAN...).
Could you also clarify the actual DDNS service name used on Windows Server? I cannot seem to find any references online for a Windows Server DDNS service.
Best regards,
DaumantasG