Your network contains an ISA Server 2006 computer named ISA1, which functions as a remote access VPN server for the network. ISA1 is a member of a workgroup. ISA1 is configured to accept only EAP authentication for VPN clients. All VPN clients have been assigned user certificates from the corporate enterprise certification authority (CA). Users report that they cannot connect to the network. They state that they receive the following error message:
Error 691: Access was denied because the username and/or password was invalid for the domain.
You need to ensure that VPN users can connect to the network.
What should you do?
A.
Join ISA1 to the corporate network domain.
B.
Place the CA certificate into the VPN clients Trusted Root Certification Authorities computer certificate store.
C.
Enable remote access permissions for the VPN user accounts in Active Directory.
D.
Configure ISA1 to use RADIUS authentication.