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The steps above describe how to install the certification authority (CA) on your Microsoft Active Directory server. Review the information on the results screen to verify that the installation was successful.After verifying the information on the Confirm Installation Selections page, click Install.On the Set Validity Period page, accept the default values or specify other storage locations for the certificate database and the certificate database log, and then click Next.
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This installs a certification authority (CA) which is used to issue certificates. This is required before you can install Windows Certificate Services.