From the CA server, open Certification Authority.
From the left panel, expand the CA, and then click Issued Certificates.
Right-click a certificate to revoke, and then click All Tasks > Revoke Certificate.
Select a reason code and the date and time for revocation, and then click Yes.
From the left panel, right-click Revoked Certificates, and then click All Tasks > Publish.
You can see the revoked certificate serial number in the CRL.