Creating outbound delivery for no availability check

The stock for a material is zero (in T-code MMBE). There is no availability check for this material.

I could successfully create a sales order for this material.

But when I try creating a outbound delivery for this material it doesnt allow me to do. What could be the problem.

I checked the delivery item category, schedule line. They also have no availabilty check.

What are the settings I need to check so that I can create a outbound delivery successfully,