Open the Certificates snap-in for a user, computer, or service.

In the console tree under the logical store that contains the certificate to modify, click Certificates.

In the details pane, click the certificate that you want to modify.

On the Action menu, click Properties.

Make the desired changes:

1. To change the display name of the certificate, in Friendly name, type the new name.
   
   
2. To change the description of the certificate, in Description, type the new description.
   
   
3. To enable all available purposes for the certificate, in Certificate purposes, click Enable all purposes for this certificate.
   
   
4. To disable all available purposes for the certificate, in Certificate purposes, click Disable all purposes for this certificate.
   
   
5. To designate specific purposes for the certificate, in Certificate purposes, click Enable only the following purposes, and select the appropriate check boxes.
   
   
6. To modify cross-certificate properties, click the Cross-Certificates tab, click Specify additional Cross-Certificate download locations, enter the URL where the cross-certificates can be obtained, and click Add URL.
   
   
7. Click OK to accept all changes.