Resources to support suppliers throughout the S/4HANA transition, including blackout impacts, invoicing guidance, and key actions.
Halliburton will transition to SAP S/4HANA (S/4) on October 15, 2026. This change will impact how we transact with suppliers, customers, and external partners. Review what to expect before, during, and after the system blackout and go-live, including impacts to purchase orders and invoicing, by accessing the Supplier Resources Job Aid linked below.
Please see below for the key blackout dates for suppliers.
| Period | Impact / Activity | Details |
|---|---|---|
| July 15 – September 29, 2026 | HSN Invoicing | Available for existing POs only |
| August 30 – October 15, 2026 | Vendor Account Changes | Creation and updates (name, address, bank details) unavailable |
| September 27 – October 15, 2026 | Invoice Submission (AP / EDI) | AP email submissions allowed but may have delayed status updates until after go-live EDI invoices continue and will be posted in S/4 after go-live |
| September 29 – October 15, 2026 | Purchase Orders (POs) | No new POs or changes to existing POs (pricing, quantities) Manual POs allowed only for urgent cases SAP Business Network invoicing and PO collaboration will be disrupted due to ECC cutover |
| October 15, 2026 | System Go-Live | Systematic invoice processing resumes in S/4 |
All dates subject to change.
Contact Us
Suppliers can easily submit and track inquiries through the Halliburton Request Tool (HRT). Please register for HRT on this page.
