When adding a user from forestB to a security group in forestA we get error:
The following Active Directory Domain Services error occurred: an internal error occurred .
This error happens from our management server only. We do not get this error when performing task from a domain controller. It use to work without issue, and not aware of any changes as we still have a two way trust and not sure what to look for. Our AD database is healthy. Could it be a MS patch causing this this?