Cannot Remove or Overwrite Existing Certificates
Problem You cannot remove or overwrite your existing certificate with a new one.
Possible Cause Cisco Webex Meetings Server does not allow you to remove certificates but you can overwrite them. If you are unable to overwrite your certificate, SSO might be enabled.
Solution Sign in to the Administration site and disable SSO before you attempt to overwrite your certificate. For more information, see "Disabling SSO" in the Cisco Webex Meetings Server Administration Guide.