Active Directory Logon / Site Link Bridge Issue

Question

Dear NC,
i have an issue with users in different Locations, to explain easyest here is a little network diagram:
So, as one can see, i have 4 Locations, one is the Headquarter.
The Target Goal is: Users in Location C must Logon with Domaincredentials from Sub.domain.tld from Location A.
Location HQ, A and B are fully routed, Location C has only a route to Location B.
Every Location has at least one writable DC with GC ans DNS Server installed.
I have the following site links:
HQ<>A
HQ<>B
A<>B
B<>C
and also a Site Link Bridge with "A<>B" and "B<>C".
Unfortunatly Users cannot logon in Location C with sub.domain.tld Domaincredentials from Location A.
Need a bit help, thx :-)
-Bernd

Answer 1

Hi Bernd,
I am sorry that I am a little confused here, would you please clarify what do you mean by “Users in Location C must Logon with Domaincredentials from Sub.domain.tld from Location A”?
From what I understand, you have two domains:
domain.tld and sub.domain.tld, and you want that user accounts in
sub.domain.tld (location A) can logon from domain.tld (location C), am I right?
If that is your goal, please make sure the following conditions are true:
During the logon process, specify the right domain name which is like
@sub.domain.tld.
The GC in location C is available to identify the appropriate Domain Controller for authentication process.
There is no network connectivity issues between location A and C, because after GC located a DC in location A, the logon process will take place between location A and C.
In addition, every site should have good network connectivity with at least another site to keep AD replication healthy. If there are critical errors in your HQ site, we should try
to resolve them.
Here is a related article below for your reference:
What Is the Global Catalog?
http://technet.microsoft.com/en-us/library/cc728188(v=WS.10).aspx
Please feel free to let us know if there are any further requirements.
Amy Wang