[cifs-protocol] [REG:118040517948537] MS-ADTS: msDS-ResultantPSO and DOMAIN_USER_RID_KRBTGT discrepancy

Obaid Farooqi obaidf at microsoft.com
Fri Apr 6 17:48:05 UTC 2018

Hi Tim:
I'll help you with this issue and will be in touch as soon as I have an answer.

Obaid Farooqi
Escalation Engineer | Microsoft

Exceeding your expectations is my highest priority.  If you would like to provide feedback on your case you may contact my manager at ramagane at Microsoft dot com

-----Original Message-----
From: Obaid Farooqi 
Sent: Friday, April 6, 2018 12:47 PM
To: "'Tim Beale'" <timbeale at catalyst.net.nz>
Cc: "cifs-protocol at lists.samba.org" <cifs-protocol at lists.samba.org>; "MSSolve Case Email" <casemail at microsoft.com>
Subject: [REG:118040517948537] MS-ADTS: msDS-ResultantPSO and DOMAIN_USER_RID_KRBTGT discrepancy

Hello Tim 

We have created a case; 118040517948537, to track your inquiry and an Escalation Engineer will contact you to assist further.

Best Regards,
Tarun Chopra | Sr. Escalation Engineer
Open Specifications Support Team
Work +1-425-705-5042
Email  tarun.chopra at microsoft.com
Monday-Friday 9:00a-6:00p Pacific Timezone 

-----Original Message-----
From: Tim Beale <timbeale at catalyst.net.nz>
Sent: Thursday, April 5, 2018 2:00 PM
To: Interoperability Documentation Help <dochelp at microsoft.com>; cifs-protocol at lists.samba.org
Subject: MS-ADTS: msDS-ResultantPSO and DOMAIN_USER_RID_KRBTGT discrepancy 


I'm looking into the behaviour of msDS-ResultantPSO and found a discrepancy between the specification and the actual behaviour.

In MS-ADTS, section msDS-ResultantPSO [1], it says the

  If the RID in U!objectSid is equal to DOMAIN_USER_RID_KRBTGT, then there is no value in this attribute. 

I tried adding a PSO object and applying it to the krbtgt user on a Windows 2012R2 VM. Based on the spec, I would expect no msDS-ResultantPSO to be returned for the krbtgt user. However, I do see one returned, e.g.

# record 1
objectSid: S-1-5-21-886655096-618523297-2770022155-502
msDS-ResultantPSO: CN=dummy-PSO,CN=Password Settings Container,CN=System,DC=WINDOWS2012R2,DC=WIN,DC=TIM,DC=WGTN,DC=CAT-IT,DC=

You can see the RID in the objectSid is 502, which is DOMAIN_USER_RID_KRBTGT. 

Could you please clarify which is incorrect - the specification or the Windows behaviour? Or have I misunderstood something?



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