Microsoft Word's Similarity Checker will be retired on October 3, 2026, and removed from Microsoft Editor. Other writing and editing features, including Microsoft 365 Copilot, remain unaffected. Organizations should review workflows, inform users, and consider alternatives if needed. No action or compliance issues are required.
Applies to: Microsoft 365 apps
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).