The CBP AD domain has a 2 way external trust setup with the DSA.DHS domain (Appauth domain).  
The trust relies on communication with the following AD domain controllers. If the PDC FSMO roll has to be moved it can only be moved at this time to one of the domain controllers listed below.  
   
DOMAIN CONTROLLERS  
DC name                              IP Address  
TCKV05A-P0014                10.239.168.209  
TCKV05A-P0015                10.239.168.210  
TCKV05A-P0016                10.239.168.211  
TCKV05A-P0017                10.239.168.212  
TCKV05A-P0018                10.239.168.213  
TCKV05A-P0019                10.239.168.214  
TNWG01A-P0121             10.5.113.100  
TNWG01A-P0124             10.5.113.103  
TNWG01A-P0126             10.5.113.105  
TNWG01A-P0127             10.5.113.106  
TSSC05A-V0013                 10.16.71.42  
TSSC05A-V0014                 10.16.71.43  
TSSC05A-V0015                 10.16.71.44  
TSSC05A-V0016                 10.16.71.45  
TSSC05A-V0017                 10.16.71.46  
TSSC05A-V0018                 10.16.71.47  
**CONTACT INFORMATION FOR DSA.DHS**  
Whenever you plan on updating/modifying the listed DCs please send an email to our distro group AppAuth_Distro@hq.dhs.gov so everyone on the AppAuth team sees the request. Contact for this information was Abbrahim Beg.
 \> From \<[https://uconnect.cbpnet.cbp.dhs.gov/sites/OIT/edme/edco/dco/osg/WSG%20Wiki/AD%20Trust%20with%20DSA.DHS.aspx](https://uconnect.cbpnet.cbp.dhs.gov/sites/OIT/edme/edco/dco/osg/WSG%20Wiki/AD%20Trust%20with%20DSA.DHS.aspx)\>