Vendor Data Included in the Migration
The migration scope normally begins with the Dynamics GP vendor master and expands to the attributes required by Business Central. The exact fields depend on the company's configuration, legal entities, currencies, and purchasing processes.
- Vendor identity: Vendor number, legal name, address, contact information, and communication details.
- Financial attributes: Posting groups, currencies, payment terms, payment methods, tax information, and applicable dimensions.
- Purchasing information: Buyer assignments, purchase-related defaults, vendor item references, and purchasing classifications.
- Payment details: Bank information, payment instructions, and settlement preferences subject to appropriate controls.
- Status information: Active, inactive, blocked, or otherwise restricted supplier records based on business requirements.
Data cleansing should identify duplicate suppliers, obsolete records, inconsistent addresses, missing payment terms, and mismatched account mappings before migration. This creates a cleaner Business Central vendor structure and supports consistent vendor management after go-live.
Vendor Mapping and Transformation
Dynamics GP and Business Central organize ERP information differently, so vendor fields should be mapped deliberately rather than copied solely by field name. A vendor's GP account number may become the Business Central vendor number, while GP purchasing and posting attributes may need to be translated into Business Central posting groups, dimensions, and payment configurations.
The migration team should establish mapping rules for each relevant field and document exceptions. Vendor numbering is particularly important when other records, purchase orders, invoices, or historical reports reference the legacy identifier.
Vendor-related procurement processes should also be reviewed because supplier records influence purchase orders, approvals, receipts, invoice processing, and purchasing analysis. The resulting Business Central configuration should support the same business relationships while taking advantage of the destination ERP's structure.
Accounts Payable and Invoice Continuity
Vendor migration should be coordinated with open accounts payable transactions. If unpaid invoices are migrated, the corresponding vendor identifiers, document numbers, amounts, currencies, due dates, and posting information must align with the new vendor records.
Effective invoice processing depends on accurate supplier identification, because invoice data must be associated with the correct Business Central vendor before validation and posting. AP Automation Software can subsequently support invoice processing and payment planning using the migrated vendor master as its reference structure.
For invoice workflows, invoice matching can compare invoice information with purchase orders, receipts, contracts, or other source records. The Vendor Invoice Processing 2025: AI Supplier Workflow Guide provides additional context on supplier invoice capture, validation, coding, approval, and posting.
Teams should also establish Invoice Matching Verification procedures so that invoice-to-purchase documentation is validated before posting. This helps maintain reliable vendor balances and supports accurate accounts payable reporting.
Supplier Communication and Payment Setup
Vendor migration is more than transferring names and addresses. Supplier communication preferences should be reviewed so that purchase orders, remittance information, invoice inquiries, and status updates continue to reach the appropriate contacts after the transition.
Purchase Order Vendor Communication is especially relevant when procurement teams depend on accurate supplier contacts and clear purchase-order information. Vendor-facing processes should be tested with representative suppliers before Business Central becomes the primary system.
Payment information should receive separate validation because supplier bank details and payment methods directly affect cash disbursement. The Payment Approval process should define the appropriate authorization before migrated or newly created vendor records can be used for payments.
The payments workflow should then be tested using representative vendors, currencies, payment methods, and approval scenarios. How Vendor Portals Improve Invoice Transparency also provides useful context when extending supplier-facing invoice status and communication processes.
Migration Validation and Reconciliation
Validation should compare the source Dynamics GP vendor population with the Business Central destination population. Teams should verify vendor counts, identifiers, names, currencies, payment terms, posting groups, dimensions, and status classifications.
- Compare active and inactive vendor counts between GP and Business Central.
- Verify vendor-level open balances against the corresponding accounts payable control account.
- Confirm that payment terms and due-date calculations are mapped correctly.
- Validate currencies, tax attributes, posting groups, and dimensions.
- Test vendor creation, purchasing, invoice posting, approval, and payment scenarios.
Where vendor transactions are migrated alongside master data, reconciliation should confirm that every open transaction points to the intended Business Central vendor. The broader accounts payable process should also be tested after ERP migration so vendor balances, invoice status, approvals, and reporting remain consistent.
Automation and Post-Migration Operations
After migration, automation can extend the value of a clean vendor master by connecting supplier information with invoice capture, validation, purchasing, approvals, and payment workflows. Controls should use Business Central as the authoritative ERP record for ongoing finance operations.
Vendor-focused workflows can use structured supplier information to support faster invoice handling, consistent coding, and controlled approvals. Automated processes can also maintain repeatable workflows around vendor onboarding, invoice validation, and payment preparation while preserving appropriate finance-team oversight.
Best Practices for Vendor Migration
The strongest migration approach combines data governance, field-level mapping, cleansing, controlled loading, and reconciliation. Businesses should establish ownership for vendor master data and define who can create, modify, approve, and deactivate supplier records in Business Central.
- Define the migration scope and cutover date before extracting GP data.
- Remove duplicate and obsolete supplier records according to documented business rules.
- Preserve legacy vendor identifiers where they support audit and historical reporting.
- Test representative domestic, international, multi-currency, and tax-sensitive vendors.
- Reconcile vendor balances and purchasing transactions after the final load.
- Document post-migration ownership for vendor master maintenance.
These practices help Business Central provide a consistent foundation for supplier operations, financial reporting, procurement, invoice processing, and payment execution.
Summary
Dynamics GP Vendor Migration to Business Central transfers supplier master data and related purchasing and payment attributes into the new ERP while preserving the information required for finance and procurement operations. Accurate mapping, cleansing, validation, open-balance reconciliation, and supplier-process testing are central to a successful transition. When the resulting vendor master is structured correctly, Business Central can support reliable accounts payable, procurement, invoice processing, payment workflows, and ongoing vendor management.