In the Projectmodule, the line property attached to the purchase order line for an item determines whether the purchased item is invoiced to a customer. Below you can see the invoicing options:

• If you do not want to invoice the project's customer, a line property that cannot be invoiced is attached to the purchase order line. The purchase order is invoiced, and no further action needs to be taken.

• If you do want to invoice the project's customer and an invoiceable line property is attached to the purchase order line, not only must the purchase order invoice be updated, but you must invoice the customer using the invoicing system in Project.

• For more information, see Invoice time and material.