Internal error: An Active Directory Domain Services error has occurred.

We are receiving this on an SBS 2008 server every day at 11:30pm. Other than this, no other errors occurring and no overall problems. Standard DCDiag test check out. It was a brand new install/domain. Can't really find any information on what is causing this error. Has anyone seen this error before?
Here are the details:
Internal error: An Active Directory Domain Services error has occurred.
Additional Data
Error value (decimal):
-1032
Error value (hex):
fffffbf8
Internal ID:
160207ce
Event ID: 1168
Source: ActiveDirectory_DomainService
Any help to find a solution would be much appreciated!!
