OK. Here is the final text:
* if the test client is not already joined to an AD domain, execute the "realm join
--user=Administrator <ad-domain-name>" command
* the "realm join" command performs the test client setup (including domain
join, SSSD package installation and SSSD configuration).
* see
http://fedoraproject.org/wiki/QA:Testcase_realmd_join_sssd for examples of using
and troubleshooting the "realm join" command
* make a note of the DN of the computer object created by "realm join" (which
represents the test client).
* In order for a GPO to be applicable to the test client, it must be linked to an ou
parent or dc parent of the test client's DN (or to the site associated with the test
client).
Regards,
Yassir.