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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / Why does "Order No." g...
Small and medium business | Business Central, N...
Suggested Answer

Why does "Order No." gets missing on the header level when multiple PO's are used?

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Posted on by CU20112316-1 265
Why does "Order No." gets missing on the header level when multiple PO's are used?
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Dynamics 365 Business Central
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  • Suggested answer
    Valentin Castravet Profile Picture
    Valentin Castravet 32,152 Super User 2026 Season 1 on at
    The Order No. field on the header only works when there’s a single PO. If the posted purchase invoice is linked to multiple POs, that field can’t be used because it can only show one PO even though multiple exist. 
     
  • CU20112316-1 Profile Picture
    CU20112316-1 265 on at
    Can you provide me a proof or documents that can justify this system behavior please.
  • Suggested answer
    Pallavi Phade Profile Picture
    Pallavi Phade 5,420 Super User 2026 Season 1 on at
    Namaste @CU20112316-1
     
    Order No Field is available in header and line . Order No for header will useful when you want to do purchase reciept , posted purchase invoice and want to know what is its Order no or source no
     
    Order No at line level is useful when you pull mutilple reciepts for invocing . In a single invoice you can have multiple POs and multiple Receipts . At this instance line level data is helpful 
     
     
     
    Hope this clarifies 
     
     
    Warm Regards
    Pallavi Phade
  • Suggested answer
    OussamaSabbouh Profile Picture
    OussamaSabbouh 12,808 Super User 2026 Season 1 on at
    Hello,
     
    When a purchase invoice or order pulls lines from multiple different POs, Business Central cannot put more than one Order No. on the header, so it simply clears the header field.
    The PO numbers are still stored correctly — but only on the line level, not the header.
    That’s the expected system behavior.
     
    Regards,
    Oussama Sabbouh
  • Suggested answer
    Pallavi Phade Profile Picture
    Pallavi Phade 5,420 Super User 2026 Season 1 on at
    Namaste @CU20112316-1
     
    Order No Field is available in header and line . Order No for header will useful when you want to do purchase reciept , posted purchase invoice and want to know what is its Order no or source no
     
    Order No at line level is useful when you pull mutilple reciepts for invocing . In a single invoice you can have multiple POs and multiple Receipts . At this instance line level data is helpful 
     
     
    Hope this clarifies 
     
     
    Warm Regards
    Pallavi Phade
  • Suggested answer
    OussamaSabbouh Profile Picture
    OussamaSabbouh 12,808 Super User 2026 Season 1 on at
    Hello,
     
    When you use multiple purchase orders on one document (for example, a posted purchase invoice created by Get Receipt Lines / Get Order Lines or Combine Shipments on sales), Business Central can’t store more than one order number in the header.
    So it behaves like this:
    If all lines come from the same PO, the header field Order No. is filled with that order number.
    If the document contains lines from more than one PO, the system leaves Order No. blank on the header (because there’s no single value).
    The individual lines still keep their originating Order No., so you can see which PO each line came from.
    So the field isn’t “lost” – it’s just intentionally not shown at header level when multiple different order numbers are involved.
     
    Regards,
    Oussama Sabbouh
  • Suggested answer
    Pallavi Phade Profile Picture
    Pallavi Phade 5,420 Super User 2026 Season 1 on at
  • Suggested answer
    Jainam M. Kothari Profile Picture
    Jainam M. Kothari 15,732 Super User 2026 Season 1 on at
    Hello,
     
    The “Order No.” field on the Purchase Invoice header disappears when multiple Purchase Orders are involved because Business Central only supports a one-to-one relationship between a Purchase Invoice and a Purchase Order at the header level. When you pull lines from multiple POs (using Get Receipt Lines or similar), the system cannot assign a single order number to the header, so it leaves the field blank for consistency. The linkage to individual orders is maintained at the line level through the Order No. field on each line, ensuring traceability even though the header cannot represent multiple sources.
  • Suggested answer
    Jainam M. Kothari Profile Picture
    Jainam M. Kothari 15,732 Super User 2026 Season 1 on at
    Hello,
     
    The “Order No.” field disappears at the header level when multiple Purchase Orders are involved because Business Central enforces a one-to-one relationship between a Purchase Invoice header and a Purchase Order.
     
    When you pull lines from multiple POs (e.g., using Get Receipt Lines), the system cannot assign a single order number to represent multiple sources, so it leaves the header blank for consistency.
     
    The linkage is maintained at the line level, where each line retains its original Order No., ensuring traceability even though the header cannot display multiple values.
  • Suggested answer
    Rishabh Kanaskar Profile Picture
    Rishabh Kanaskar 6,219 Super User 2026 Season 1 on at
    Hi,
     
    Because the header can only hold one “Order No.” value. If the purchase order lines are linked to different source orders, Business Central leaves the header “Order No.” blank and keeps the per‑line “Order No.” values.
     
     
    Thanks
    Rishabh

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