Sage 50 and Workday HCM integration

What moves between them

The main flow is from Workday into Sage 50. Employee records, purchase orders, and supplier invoices move from Workday into Sage 50 on a 15-minute polling schedule. Vendors and cost centers are aligned in both directions so invoices and payroll land on valid GL accounts in Sage 50. Accounts and dimensions that are referenced on Workday documents are created or updated in Sage 50 as needed. General ledger posts are one-directional: Workday financial journals flow into Sage 50, but Sage 50 GL entries do not flow back to Workday, since Workday's financial API surface is primarily a read-mostly system for posting from other sources.

How ml-connector handles it

ml-connector polls both systems on a 15-minute cadence aligned to your payroll calendar. For Sage 50, it authenticates with Windows local credentials passed to the SDK or COM layer and queries the SDK for records modified since the last poll; the connector maintains an exclusive session so the interactive user does not access Sage 50 simultaneously. For Workday, it authenticates via OAuth2 bearer token for REST-accessible HR data and via SOAP WS-Security UsernameToken for payroll and financial data, refreshing the OAuth token before expiry. Vendors and cost centers are synced first to ensure every invoice and employee record references valid GL accounts in Sage 50. Because Workday does not expose timestamps on some resources like Supplier_Invoices, ml-connector may re-process invoices on each poll; idempotency keys prevent duplicate GL postings. Retries use exponential backoff when Workday returns HTTP 429 (rate limit). Sage 50 transactions are limited by SDK availability in each edition, so older or complex transaction types may only be accessible via the legacy COM or ODBC layer.

A real-world example

A mid-sized manufacturing company runs Sage 50 for accounting and inventory on a Windows server, and uses Workday for payroll, benefits, and supplier management across multiple locations. Before the integration, the finance team manually exported new hires and supplier invoices from Workday every week, re-entered them into Sage 50, and spent hours reconciling vendor and employee lists. With Sage 50 and Workday HCM connected, new hires appear in Sage 50's employee list within 15 minutes, supplier invoices flow directly into GL postings on the correct cost center, and month-end reconciliation requires no manual spreadsheet work.

What you can do

• •Sync employees from Workday into Sage 50 on a schedule you control, keeping headcount and pay-stub GL allocations in agreement.
• •Move purchase invoices and supplier records from Workday to Sage 50 so payables and GL accounts are pre-populated without re-keying.
• •Align vendors and cost centers in both directions so every invoice and payroll journal lands on a valid Sage 50 GL account.
• •Authenticate Sage 50 via local Windows SDK credentials and Workday via OAuth2 or SOAP integration user, with encrypted credential storage.
• •Poll both systems on a 15-minute cadence with idempotency checks and exponential backoff retries for rate limits and transient errors.

Questions

Does ml-connector require a Windows machine to run alongside Sage 50?

Yes. Sage 50 exposes data only through a local Windows SDK or COM layer, not through a REST API, so ml-connector must run on a Windows machine with access to the Sage 50 company data files. The connector maintains an exclusive SDK session, so the interactive Sage 50 user cannot access the system while the integration is polling.

Which API surfaces does ml-connector use for Workday HCM?

ml-connector uses REST OAuth2 for HR and staffing data like employees and positions, and SOAP WS-Security UsernameToken for payroll, GL accounts, and supplier records. Supplier_Invoices in particular requires SOAP access. The connector manages both token types and refreshes OAuth tokens before they expire.

How does ml-connector handle the lack of webhooks in both systems?

Both Sage 50 and Workday require polling instead of webhooks. ml-connector polls both on a 15-minute cadence and queries each system for records modified since the last check. For Sage 50, it uses LastModifiedDate; for Workday, it uses date-filtered queries where available. Some resources like Workday Supplier_Invoices lack date filters, so ml-connector uses idempotency keys to prevent re-processing the same invoice multiple times.