It still shows confirmed quantity at sales order in case of no stock

Hi,

I have the availability check configuration, but my requirement for 0 confirmed quantities at sales order in case of no stock is not working. That is- It still shows confirmed quantity at sales order in case of no stock. Please suggest.

All the setting for availability check is done. I have set the accumulation as 3 in checking group. But still not working.

Thanks

Mauryan