RT 4.4.1 Import Users

Can someone tell my how I import users from Active Directory (AD)? When I login I can use my AD log in and password but that is because I am in RT. RT is recognizing my credentials. What I would like to do is bulk import users from AD to RT.

Note: We now have this working.

Use this to authenticate against AD (or other ldap source): https://docs.bestpractical.com/rt/4.4.1/RT/Authen/ExternalAuth.html
And this to import your users in RT so they are available for auto-completion or right granting: https://docs.bestpractical.com/rt/4.4.1/RT/LDAPImport.html