Go to integration page (https://app.targetez.com/integration) and click on "Connect with Facebook" :

Allow the necessary permissions:

Note: The "manage your ads" permission is required for the operation of importing your searches into your ad manager, for behavioral searches as well as demographic searches & templates

Choose your main ad account

- Select the ad account you are interested with and click on "update" 

⚠ Your ad account must be "Active."

Choose your main pixel

Scroll down and then select your main pixel used for custom audiences templates. 

You can now use the advanced features of the software!

If you don't see your ad account listed, you are missing an authorization. See this article to solve this case.