# Implementing Common Access Card Authentication

You can configure the Command Center computers in a CommCell environment to recognize a user's Common Access Card (CAC) and the associated PIN, to enable CAC authentication.

## Procedure

1. Import a certificate authority root certificate using the Commvault certificate tool.

   - Windows

   - Linux

2. Enable CAC authentication:

   - In a non-LDAP environment, configure additional settings in the CommCell Console to match with the data in the user's CAC card.

   - In an LDAP environment, specify the CN values in the domain controller to match with the card users.

     For example, see Domain Controller Settings for Active Directory.

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