Your Braintree account must be enrolled in 3D Secure first, as it is only compatible with certain configurations. Contact Braintree support for more information and access.
To confirm that your Braintree account is ready to use with 3D Secure:
Click on the Merchant Account ID link for the account you'd like to verify
If your account is enrolled in 3D Secure, the following will be true:
The 3D Secure 1 field will show as Enrolled
3D Secure 1 or EMV 3D Secure 2 will be automatically selected based on which version is most likely to lead to successful authentication and authorization.