TR creation for items with no available stock

Hi,

I have the problem that SAP is creating Transfer requirements for Items which we can not replenisment, because we do not have sufficient qty on stock.

Where in customizing can I change this. We have a centralized WM.

Also is there a way to turn-off TR creation at all. That means that system is creation directly TO's if possible and nor TR's at all?

Thanks for your responses.

Guersel