What are the inventory transactions that support entering serial numbers at pick confirmation?

You can enter serial numbers at pick confirmation for inventory transactions such as sales order pick, transfer order pick, transfer order return pick, and movement request issue.

For internal material transfers, you can enter serial numbers between two inventory organizations (interorganization transfer) including for expense destinations. For internal material transfers between two subinventories (intraorganization or intersubinventory transfer) you can't enter serial numbers except for destination type expense.