To deliver tokencodes to a mobile phone, you use Short Message Service (SMS) to send a text message that includes the tokencode. A digital certificate may be required by some SMS providers or when HTTP connections are redirected to an HTTPS site. You can delete your SMS provider’s certificate at any time, for example, when you change SMS providers.
Deleting the certificate disables the HTTPS connection to the SMS provider.
In the Security Console, click Setup > System Settings. Under Authentication Settings, click On-Demand Tokencode Delivery, and click the SMS Configuration tab.
Under SMS Provider Configuration, for Certificate Name, click the certificate name.
On the Certificate Properties page, click Delete Certificate > OK.