The special stock indicator E is not determined in the STO Delivery

Hi,

Kindly let me what are the customising settings to be done for Transfering Sales Order Stock through STO.

Purchase Order type UB, Delivery Type NL, Plants as customers have been created. We are able to transfer materials from unrestricted stock, however unable to move sales order stock from one plant to another using the same.

The special stock indicator E is not determined in the Delivery for moving the Sales Order stocks. Kindly let me know if any customising is to be done to bring the special stock indicator E.

with kind regards

KMR