Your network contains two Active Directory forests named contoso.com and adatum.com. Active
Directory Rights Management Services (AD RMS) is deployed in contoso.com. An AD RMS trusted
user domain (TUD) exists between contoso.com and adatum.com. From the AD RMS logs, you
discover that some clients that have IP addresses in the adatum.com forest are authenticating as
users from contoso.com. You need to prevent users from impersonating contoso.com users. What
should you do?
A.
Configure trusted e-mail domains.
B.
Enable lockbox exclusion in AD RMS.
C.
Create a forest trust between adatum.com and contoso.com.
D.
Add a certificate from a third-party trusted certification authority (CA).