Below are pictures of my network (remade for security purposes but very close).
The Jira Developers group has the list of Jira Users to be added to the jirausers group.
The Jira Developers path is:
CN=Jira Developers,OU=JiraGroups,OU=Groups,OU=Shire,OU=Middle Earth,DC=MY,DC=KINGDOM,DC=COM
My base DN should be DC=MY,DC=KINGDOM,DC=COM, correct?
And the Additional Group DN should be CN=Jira Developers,OU=JiraGroups,OU=Groups,OU=Shire,OU=Middle Earth, correct?
My biggest problem is that instead of importing the 300+ names in the Jira Developers group, the system grabs all 50,000 user objects (45K, if I filter out the disabled accounts) higher up the tree.
No configuration I use will take only the users in the group. What am I doing wrong?

