Procedure

1. Go to Administration → IMSVA Configuration → Transport Layer Security.
   The Transport Layer Security screen appears with the Messages Entering IMSVA tab displayed by default.
2. Click the SMTP and HTTPS Certificates tab.
   The SMTP and HTTPS Certificates screen appears.
3. Select one or multiple certificates to delete.

   Note Certificates currently in use cannot be deleted.

4. Click Delete under SMTP and HTTPS Certificate List.