Your network contains an Active Directory domain named contoso.com. The domain contains three domain controllers. The domain controllers are configured as shown in the following table.
You are creating a Distributed File System (DFS) namespace as shown in the exhibit. You need to identify which configuration prevents you from creating a DFS namespace in Windows Server 2008 mode.
Which configuration should you identify?
A. The location of the PDC emulator role
B. The functional level of the domain
C. The operating system on Server1 and Server3
D. The location of the RID master role