Dear team, I have installed wordpress multi site on windows

Dear team,
I have installed wordpress multi site on windows server with IIS.
the multi site working very fine, users can register and can create site perfectly..

and the multisite i have instlled as directory base ( not sub domain)

if a user creates the website, the url is absolutecloud.im/myblog.

i have installed the domain maping plugin and pro site plugin, but i have not set domain maping as a pro site ... it is for any one

when a user try to configure to primary domain it is saying invalid as a status...

Note: the DNS of the primary site entered have the A records of my server and worked perectly if i install the wordpress directly, but i removed the wordpress instalation and created a new blog in my multi site and when try to configure the domain to that new blog, it not resolving...

please help me to resolve the issue

( i have gone through every step in your documentation, like sunrise.php etc)

thank you
regards
ejaz