Hello Isaac, I’m researching this issue for you. I will provide you with an 
update as soon as I have some details to share with you.


Regards,
Sreekanth Nadendla
Microsoft Windows Open Specifications


From: Hung-Chun Yu <[email protected]>
Sent: Tuesday, January 28, 2020 11:22 AM
To: Isaac Boukris <[email protected]>
Cc: support <[email protected]>; Greg Hudson 
<[email protected]>; [email protected]
Subject: [120012821001754][MS-SFU]Clarification request on cross-realm RBCD in 
MS-SFU 3.2.5.2.2

+support [cc]
-dochelp [bcc]

Hi Isaac

Thank you for your question.  We created SR 120012821001754 and please leave 
this info in the subject line to track your issue.  An engineer will contact 
you soon.
​
Hung-Chun Yu​
Microsoft Protocols Support​

________________________________
From: Isaac Boukris <[email protected]<mailto:[email protected]>>
Sent: Tuesday, January 28, 2020 5:30 AM
To: Interoperability Documentation Help 
<[email protected]<mailto:[email protected]>>; Greg Hudson 
<[email protected]<mailto:[email protected]>>; 
[email protected]<mailto:[email protected]> 
<[email protected]<mailto:[email protected]>>
Subject: [EXTERNAL] Re: Clarification request on cross-realm RBCD in MS-SFU 
3.2.5.2.2

Hi again,

On Sun, Jan 26, 2020 at 1:57 PM Isaac Boukris 
<[email protected]<mailto:[email protected]>> wrote:
>
> When a KDC replies with Service Ticket (MS-SFU 3.2.5.2.2), how does it
> determine the reply cname and crealm.
>
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fopenspecs%2Fwindows_protocols%2Fms-sfu%2Fce6bbf34-0f11-40d6-93d1-165a3afa0223&amp;data=02%7C01%7CHungChun.Yu%40microsoft.com%7C3a83b03cfab04f57ca3a08d7a3f680de%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637158151428246386&amp;sdata=MjRHU0UvvE9zuzJqoQGt%2FeQECFo8xwNs9KU9DvuYNuQ%3D&amp;reserved=0<https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fopenspecs%2Fwindows_protocols%2Fms-sfu%2Fce6bbf34-0f11-40d6-93d1-165a3afa0223&data=02%7C01%7Csrenaden%40microsoft.com%7C85935b52f45841af7f0608d7a4278fd0%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637158362130403984&sdata=nKrdFdaAXXCP8x4zrZth4PVd8YQ6nJ8%2BalPZXd2pw6U%3D&reserved=0>
>
> Per the above doc, it sounds like it should be the cname and crealm
> from the additional-ticket, however in RBCD, when the
> additional-ticket is a cross-tgt the cname and cream are of service-1
> and not of the impersonated client.
>
> In contrast, I've observed that Windows KDC constructs the
> impersonated client's principal name from the PAC, and set the reply
> cname and crealm to that principal's. However, I can't find any clear
> document that reflects it.

I've sent this over the weekend, and perhaps got lost.

In short, I think MS-SFU 3.2.5.2.2 section was not updated for
cross-realm RBCD, as other parts of the document. Please review and
assign :)
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