If you wish to set controls for all cardholders at a tenant level, you can do so via our API.
You must first create a client in our Nucleus API. You can do this either (a) sequentially after creating the client, or (b) subscribe to our "Client Creation" webhook.
You can then do a POST to the /card_control endpoint with the universal settings you require for each client. You will need to do this for each client that signs up.