Microsoft Project Online Retired on September 30, 2026

The Verified Timeline

• September 5, 2025 — Microsoft announced the retirement of Project Online via the Microsoft 365 admin center and the Microsoft Roadmap.
• October 1, 2025 — End-of-sale. Existing Project Online customers can renew but new customers cannot purchase.
• April 1, 2026 — Creation of new Project Web App (PWA) site collections was blocked across all Microsoft 365 tenants.
• April 2, 2026 — SharePoint 2013 workflows stopped executing across all Microsoft 365 tenants. Every classic Project Online workflow (SPD2013 approval flows, stage-gate automation, status-report flows) stopped then. Organizations that had not rebuilt them in Power Automate ran Project Online without automation for its final six months.
• September 30, 2026 — The retirement. Microsoft’s statement: after the retirement “you will no longer be able to access your projects or any associated data within the service”; raw data, the OData feed and the APIs are not available, and PWA-dependent functionality stops “unless the customer has an approved extension.” Every Power BI report sourcing from that endpoint lost its source.
• After the retirement — Non-PWA SharePoint content in the same site collections (lists, document libraries, pages, subsites) remains accessible through SharePoint, subject to retention and permissions. EPC Group recommends keeping full archival exports for at least 12 months for reconciliation queries, and confirming current access with Microsoft rather than assuming a grace period.

Decision Tree — Which Migration Path?

Choose Microsoft Planner Premium if: Your team plans at the department or business-unit level, you have ≤50 active projects at a time, you do not depend on complex portfolio-level formula rollups, and you are willing to accept the new Fluent UI. Most mid-market Microsoft 365 tenants land here.

Choose Power Platform PPM if: You have deep custom logic (custom formula fields, complex stage-gate flows, integration with third-party ERPs), you already have a Power Platform team, and you want a modernized Dataverse-native PPM. Highest ceiling but requires 12–18 weeks of build.

Choose Project Server Subscription Edition if: You have regulated on-premises data residency requirements (GCC High, ITAR, air-gapped), depend on classic Master Project / Enterprise Custom Fields with formula rollups, or run more than 200 active projects with dedicated portfolio managers. Requires SharePoint Server SE 2019 or later.

What Broke in Power BI

The most under-communicated part of the retirement: every Power BI report sourcing data from the Project Online OData feed (https://<tenant>.sharepoint.com/sites/pwa/_api/ProjectData) stopped on September 30, 2026 when the endpoint stopped responding. Datasets refreshing on the Power BI gateway or Direct Query models pointing at that endpoint no longer have a source. Plan for at least 4–6 weeks of report rebuild work per 20 dashboards, either against Dataverse (Planner Premium / PPM path) or against a new data warehouse (archival path).

The Sequence EPC Group Published on July 3, 2026 (Kept as the Record)

1. This week — Commission an inventory of active PWA sites, custom fields, dependent Power BI reports, and any surviving classic workflows.
2. By July 31 — Decide the migration path (Planner Premium / PPM / Project Server SE) based on the decision tree.
3. By August 15 — Start Power BI report rebuild in parallel with data-model work.
4. By August 31 — Begin waved cutover of pilot departments.
5. September 15–29 — Complete cutover, verify all reports refresh cleanly, archive PWA data.
6. September 30 — The retirement. The sequence above is the record; what to do now is on the transition offer page.

Related EPC Group Services

• Project Online Migration Consulting — The fixed-scope transition engagement after the September 30, 2026 retirement.
• Project Online to Planner Premium Migration — 5-Phase Playbook — Step-by-step inventory, mapping, report rebuild, workflow rebuild, and cutover.
• Power BI & Multi-Model AI on Microsoft Fabric — Report rebuild against Dataverse or Fabric OneLake.
• Microsoft Purview & Data Governance — Retention policies and eDiscovery for archived PWA data.
• Microsoft 365 Consulting — Tenant-level planning for the Planner Premium rollout.
• AI Governance Consulting — For organizations planning to add Copilot to Planner Premium after cutover.
• Enterprise Microsoft 365 Migrations — 216+ M&A tenant migrations, 1.83 million users moved (2023–2025), 5-day average cutover.
• 30-Day Copilot, Purview & Microsoft 365 Tenant Hardening Accelerator (fixed fee) — Governance foundation ahead of any large cutover.
• Microsoft Frontier Company Explained — July 2026 launch that reset the enterprise AI deployment conversation.