PO no of customer in ORDERS05 IDoc with 3rd party scenario

Question

Hello experts,
we have the scenario where we are getting purchase orders from our customer (which is in the same system like we are). Then we create SO for the customer and a PO to the external vendor. The goods should be delivered directly to the customer.
In that 3rd party scenario we will send our PO via ORDERS05 IDoc to the vendor. Once the vendor is shipping the goods, he sends us an ASN and we create a statistical GR.
Now our target is to give our customer somehow the information, that the delivery shipped from the vendor will be based on his PO to us. Do you know a way how we can give his PO no. to the vendor in the SAP standard ORDERS05 IDoc? Otherwise, is there a standard process to send our customer also the information that we received the ASN from vendor and transfer this information (maybe also as an ASN) to the customer with his PO no., so he can create an inbound delivery already?
Thanks.

Answer 1

Follow this Procedure... it works....
Procedure
1. Review the number ranges that have been created: The number ranges for the business partner in the Best Practices are defined as follows:
IMG u2192 Cross Application Components u2192 SAP Business Partner u2192 Business Partner u2192 Basic Settings u2192 Number Ranges and Groupings u2192 Define Number Ranges
01: The Regular business partner uses this number range: 2100000000 to 2199999999 and 03: 7100000000 to 7199999999 is used in the setting above for the ship-to party. Both are internal number ranges.
XX is the external number assignment used to create the SD reference customer.
2. The account group DEBI must temporarily be assigned to this external number assignment for the creation of this business partner:
IMG u2192 Financial Accounting u2192 Accounts Receivable and Accounts Payable u2192 Customer Accounts u2192 Master Data u2192 Preparations for creation customer master data u2192 Assign Number Ranges to Customer Account Groups:
Set account group: DEBI to external number range XX for the Business Partner creation step.
3. Create an SD customer:
Call transaction XD01: Easy Access u2192 Logistics u2192 Sales and Distribution u2192 Master Data u2192 Business Partner u2192 Customer u2192 Create u2192 Complete
u2022 Select account group: Customer (general)
u2022 Enter the Customer key: MUST_ALL
u2022 Enter company code (1000)
u2022 Enter sales area as follows:
u2022 Sales organization: 1000,
u2022 Distribution channel: 01
u2022 Division: 10.
u2022 Select Continue.
Assign MUST_ALL in Master data>bp>settings for creating standard customers.