You cannot update an existing API transaction security key. However, you can generate a new key and delete your old key. It is recommended that you permanently delete your old set of keys once the new ones have been deployed successfully in your application.

Requirements

You must have Payment Configuration user permissions: Manage Keys and View Keys, to create a new transaction security key.
 

Instructions

To create a new security key, refer to the article for your connection method:

How to Create a Secure Acceptance Security Key

How to Generate a Simple Order API Security Key

How to Generate a SOAP Toolkit API Security Key

How to Generate a SCMP API Security Key in Business Center

How to Create a REST API Shared Secret Key

Additional Information

How to Determine if a Security Key has Expired
Why do I continue to receive Keys Expired email notifications after I updated my keys?