To add a new member to the group, add a new value for the
uniquemember attribute that specifies the DN of the new
user.
This example adds a new uniquemember:
user.4.
dn: cn=QA,ou=Groups,dc=example,dc=com
changetype: modify
add: uniquemember
uniquemember: uid=user.4,ou=People,dc=example,dc=com