...
As call back use https://<Jtel Portal Host>/CarrierPortal/pages/acd/inbox/AcdInboxes.edit.xhtml
2. Create secret
Save the secret value somewhere it will not be accessible later.
Required scopes
...
3. Add permissions.
4. Get clientID and tenantID
5. Configure mail box in portal
You will find further information in "Inboxes and edit e-mails"