About -ve Inventory

Hi,

How to stop Negative inventory items in NAV?

It is possible from NAV2013R2

http://mohana-dynamicsnav.blogspot.in/2013/11/how-to-stopprevent-negative-inventory.html

If you are using earlier version then you have to customize

But am using NAv 2009 r2. Is it not possible in this version?

No, you have to customize.