User Import tool not setting the member of

Hi, i have managed to create users in AD using the User Import Tool.

However, i am trying to also assign each users with an AD Security Group.

I have mapped the Is-Member-Of-DL attribute correctly but the users seems not being assigned to the groups and instead being assigned to Domain Users group.

I would really appreciate any inputs from the Community or Solarwinds' support team.

Attached is the screenshot for reference purposes.

Thanks in advance

Aznan Nagor