Problem mapping SID with account names


Hello guys,
I have a problem which drives me mad. Long story short:
I set your UCS and connected 2 PC through Samba.

Now I am trying to deploy some GPO through the domain. The problem arises when i try to set a Scheduled Task through GPO to deliver a Powershell script and do it with mydomain\SYSTEM (hxxps://
I know this is a very dirty way and should not be used anyway when i deploy the GPO on the target machine I get an error

0x80070534 No mapping between account names and security IDs was done.

I thought this was a problem related to samba (HERE) but it should be fixed as far as i know (HERE). I did extensive research without coming to a conclusion.

So my question is: is there a way to bypass this problem in UCS?

Things i tried:

connector/s4/mapping/sid is TRUE
connector/s4/mapping/sid_to_s4 is FALSE but even if TRUE doesn't change

I don’t post logs because i haven’t anything interesting but if you need it let me know.

Thanks in advance and congratulations for your distro. Very easy and well documented.