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External Trust - Group Policy not being applied on Windows 2003 Terminal Server for User in seperate domain?

Posted on 2010-09-02
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Last Modified: 2013-12-04
I'm trying to use Folder Redirection on a Terminal Server for Users from another domain connected by an external trust.

Network configuration:

- 2 Windows 2003 domains, Domain A and Domain B
- External (non-transitive) trust with selective authentication configured between domains
- Domain A trusts Domain B
- Domain B does NOT trust Domain A
- Windows 2003 Terminal Server exists in Domain A (trusting domain)
- Folder Redirection is used on Terminal Server to redirect 'Start Menu' and 'Desktop' for Users,
depending on what Security Group they are a member of. Folder redirection works fine for all
users in Domain A.
- User1 in Domain B (trusted domain) can successfully login to Terminal Server in Domain A (trusting domain), but Group Policy processing fails to apply, therefore Folder Redirection fails and User has access to all default programs instead of only those specified by the Folder Redirection.

Error messages in  Application Log of Terminal Server when User1 logs in -
SOURCE: Userenv  EventID: 1109
CN=user1,CN=Users,DC=DomainB from a different forest logged onto this machine. Cross Forest Group Policy processing is disabled and loopback processing has been enforced in this forest for this user account.

SOURCE: Userenv  EventID: 1055
Windows cannot determine the computer name (Access is denied). Group Policy processing aborted.

Additional Information:
- User1 (Domain B) has been added to a Domain Local Security Group in Domain A which applies the Folder Redirection settings specified in a GPO applied to the OU where the Terminal Server resides in Domain A.
- Loopback processing is enabled for the mentioned GPO so User Configuration is mapped to anyone logging onto the Terminal Server. I don't need the User Policy from Domain B applied to the User at all, so the first error message (EventID: 1109) shouldn't matter.

I have everything configured and working correctly except the GPO that applies Folder Redirection for User1. Since the Terminal Server does not recognize the PC that User1 is using to login to the Terminal Server, Group Policy processing is aborted for that user.

Anyone have any ideas as to why loopback processing isn't working correctly, even though my Application Logs says that's the way it’s working?

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Question by:jthomas27
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Expert Comment

by:Spike99
ID: 33589231
Is cross forest group policy processing enabled in the GPO?

Here's a  page I found about that:
http://www.boyce.us/gp/gpcontent.asp?ID=75

Alicia
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Author Comment

by:jthomas27
ID: 33589371
No, I haven't enabled cross forest group policy processing since I don't need the User Configuration of User1 (Domain B) to be applied. I want the User Configuration setting on the GPO being applied to the Terminal Server to apply, which shouldn't be affected by the cross forest setting.

By NOT enabling cross forest group policy processing, I would expect it to work the way I want it to, which would be to apply the User Configuration of the GPO in Domain A to User1 in Domain B.

As a side note, I did apply that policy to see if it made any difference, which it didn't.  

Thanks
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Accepted Solution

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jthomas27 earned 0 total points
ID: 33646996
No solution found. I believe the problem is due to the trust being a one-way domain to domain with selective authentication instead of a 2 way trust, but I can't verify.

My solution was to just create a seperate Terminal Server for the Remote Domain Users and only allow them access that that particular sever, which has nothing on it but the application they require access to.
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