The trust configuration went through without errors but when I attempt to add external groups to the POSIX groups I get the below error.

Issue

• The trust configuration went through without errors but when I attempt to add external groups to the POSIX groups I get the below error.

 ~]# ipa group-add-member user_map --external 'AD\adusername'
[member user]:
[member group]:
  Group name: user_map
  Description: Active Directory Users external map
  Failed members:
    member user:
    member group: AD\adusername: trusted domain object not found
-------------------------
Number of members added 0
-------------------------