Microsoft Dynamics GP, originally known as Great Plains, is an accounting and enterprise resource planning (ERP) system used by many midsize organizations. It records payables well, but it was not designed to read invoices, chase approvals or check charges against contracts. Teams that rely on it alone often type invoice data by hand and route approvals by email.
Connecting an accounts payable automation layer to GP solves that: invoices are captured, matched and approved first, then posted to GP as clean records. This guide explains what to integrate and why. It also covers an important 2026 consideration: Microsoft has announced the end of new sales and a support end date for Dynamics GP, so any integration plan should account for a future move to another system.
What is Microsoft Dynamics GP?
Dynamics GP is Microsoft’s long standing accounting and business management system for midsize organizations, running on Microsoft SQL Server. It manages the general ledger, payables, receivables, purchasing and inventory. Many organizations have run it for years and have built processes and reports around it.
Microsoft has published a lifecycle plan that ends new sales and sets a date for the end of support, encouraging customers toward its cloud products. Check Microsoft’s current lifecycle information for the exact dates that apply to your version, and factor them into any investment.
Why integrate accounts payable automation with GP?
Less manual data entry
Without automation, someone reads each invoice and keys it into GP. With an integration, invoice data is extracted automatically, validated against GP’s vendor, purchase order and receipt records, and posted once. Double or triple entry disappears.
Better data capture
Automation can recognize the vendor, suggest the general ledger code, department and project, and flag missing or inconsistent fields before anything reaches GP.
No physical storage
Invoices and supporting documents are stored digitally, linked to the record in GP, and retained according to your policies. Paper storage, printing and filing go away.
Instant access
Anyone with permission can find an invoice and its supporting documents in seconds, which helps with supplier queries, audits and the month end close.
A complete audit trail
Every step from receipt to approval to posting is logged, with time stamps and user names, so auditors can trace each payment.
What should the integration cover?
| Data | Direction | Why |
|---|---|---|
| Vendors | GP to automation | Validate the supplier on each invoice |
| Purchase orders and receipts | GP to automation | Run two and three way matching |
| General ledger codes, departments, projects | GP to automation | Code invoices consistently |
| Approved invoices with coding | Automation to GP | Post clean, approved payables |
| Invoice image and attachments | Linked from GP | Make the source document available in both systems |
| Payment status | GP to automation | Show suppliers and approvers what has been paid |
Only approved invoices should flow to GP for payment. Exceptions, such as price differences or missing receipts, stay in the automation layer until a person resolves them.
What does the automated process look like?
- Invoices arrive by email, portal or scan into one queue.
- AI extracts header and line data.
- The invoice is matched to the purchase order and receipt from GP, and to contract terms.
- Coding is suggested from history and rules.
- The invoice is routed for approval based on amount, department and category.
- Approved invoices are posted to GP with the document attached.
- Payment status flows back so everyone can see it.
See what is two way and three way matching for the matching step.
How does Invoiceflow work with GP?
Invoiceflow sits in front of the accounting system. Aavenir AI reads each invoice, matches it to purchase orders, receipts and contract terms, and suggests coding; an accounts payable specialist approves every exception. Approved invoices are sent to the accounting system, and Invoiceflow keeps the documents and audit trail. Invoiceflow runs on ServiceNow or standalone, and the same approach applies to other accounting systems, which matters if you plan to move off GP.
How should you plan for the end of GP support?
If you are still on GP, separate your accounts payable process from the ledger. An automation layer that handles intake, matching and approval independently means that when you move to a new accounting system, you change the posting connection rather than rebuilding the whole process. Ask any vendor how its integration would move with you, and which target systems it already supports.
The bottom line
Accounts payable automation in front of Dynamics GP removes manual entry, matches invoices to GP records and contracts, and posts only approved invoices. With GP heading toward end of support, choose an automation layer that can move with you to your next accounting system.