This article explain how to connect your GoCardless account to Kolleno. If you do not have yet a GoCardless account, please speak with your Kolleno account manager who will be able to facilitate this.
Go to your Kolleno Company settings (only an admin user can do this)
Click on "Payments"
Next to GoCardless, click on "Connect"
Follow the flow on screen. At the end, you will be redirected to the Kolleno settings automatically.