1.These four users do not configure in AD root directory,
Solution:- Please check the configuration of the AD root department path on BMU, make sure the four users are under the department.
2.BMU and AD only sync the user under “Domain controllers Group”, but these four users group.
The objectClass of user group is like: (will sync fail)
BMU and AD only support sync users under “organizationalUnit” of objectClass
Solution: create a new department ,set objectClass as “organizationalUnit” ,then move the four users to the new department
3.check the user from the AD side and make sure that there is no Illegal character like (@, & or #...) in the name or the department of the AD user
The Root Cause was that: there was Illegal character like (@, & or @...) on the department of the AD user
try to make the fields of the AD users like (name , department etc....) donnot have Illegal character like (@,!,# and $)