There is no option to block the stock locations (STL's) while performing stock counting.

The setting for picking/linking blocked is present on the stock location (STL), and is inherited on the Stock location assignments archive (SAP) when moving to specific stock locations (STL's), but this flag will not be inherited on the goods reception item (SSA-item).


When stock counting we recommend counting smaller areas at a time, possibly combining this with an alternating count routine. 
If  the 'count' on the handheld terminal (HHT) is used, the 'expected qty' will be updated if something has been picked in-between creation and the actual counting process.