I am trying to get members of a Tridion group which is mapped to a Active directory group.

I am trying to get the details using the Core Service.

The Groupdata/GetXMLList() gives only the users/subgroups that are added manually to the group but not the users in the active directory group.

Is there a way to get all (active directory as well as manually added) users list ?

GroupData group12 = (GroupData)_client.Read(subGroupId, new ReadOptions());
var xe12 = (XElement)_client.GetListXml(subGroupId, groupMembersFilter);