Captive Portal Automatic pop up

Sophos XG V1,

 

Yesterday I added a rule for the Captive portal, went through the official video and documentation for the captive portal from Sophos, For Linux and MAC client I can get captive portal automatically in the browser while accessing anything. problem is I have to manually enter the captive portal for windows clients.

 

Please help how to configure so that I can automatically get for windows clients too.

 

thank you.

 

:)