Block a Sales order, from the Release sales order picking.

This year the warehouse have decided to do a rolling stock-take through out the year rather than do it all in one go at Christmas.

The setup is that we have a warehouse with a thousand Bin locations. We want to try and block a number of these locations at once, from the sales department I have tried blocking a location within the query option of the Release sales order picking but no luck, I also tried blocking a location from Stock management picking->Setup->Location->Other but…no luck. The reason we want to block a location from the sales department is so that a location can be reservation free and we can get a accurate stock count. Any ideas ?