Your network contains an Active Directory forest named contoso.com. The forest contains two domains named contoso.com and child1.contoso.com. All domain controllers run Windows Server 2012 R2. The domain contains four domain controllers. The domain controllers are configured as shown in the following table.
You open Active Directory Users and Computers on a client computer and connect to DC1. You display the members of a group named Group1 as shown in the Group1 Members exhibit.
When you view the properties of a user named User102, you receive the error message shown in the Error exhibit. The error message does not display for any other members of Group1.
You need to identify which domain controller causes the issue shown in the error message.
Which domain controller should you identify?