In your account's Dashboard, look for Account on the top-side navigation menu. From the Account drop-down select Merchant Account Info. In that page, you can find your Merchant ID. It will be needed to finish up the integration's setup.
In your account's Dashboard, look for Settings on the top-side navigation menu. From the Settings drop-down select API Keys. In that page, you can generate and find your Public and Private Keys as well as the Tokenization Key. They will be needed to finish up the integration's setup.
Activate the Braintree integration and click Configure.
Copy and paste the Merchant ID, Public and Secret keys to the corresponding fields. Be careful not to switch them – you should keep the secret key secret by entering it in the proper field ( as we will hide it from the other users). The Tokenization Key should be entered in the Client Authorization field.
Click Done and Braintree is activated for your organisation.