Your network contains a server that runs Windows Server 2008 R2. The server is configured as an enterprise
root certification authority (CA).
You have a Web site that uses x.509 certificates for authentication. The Web site is configured to usea many-to-one mapping.
You revoke a certificate issued to an external partner. You need to prevent the external partner from accessing
the Web site.
What should you do?

A.
Run certutil.exe -crl.
B.
Run certutil.exe -delkey.
C.
From Active Directory Users and Computers, modifythe membership of the IIS_IUSRS group.
D.
From Active Directory Users and Computers, modifythe Contact object for the external partner.