When Non-Serialized stock exists in the inventory database as a Normal category type, and it is needed to either transfer a quantity to an existing part in a Rental type category, or a new Rental Part is created in a Rental Category this is the procedure. This will transfer a quantity from the normal stock to the rental stock.

NB. This will not work when transferring stock from a Normal to a Serialized Rental Part.

The link below will outline the steps to perfom the transfer of stock from Normal to Rentals.

Optional PDF File to read:Transferring Stock Qty from Normal to Rental Categories