Glossary
Message Center
Microsoft 365's stream of announcements about upcoming changes, feature deprecations, and admin actions.
The Message Center in the Microsoft 365 admin center (admin.microsoft.com → Health → Message center) is Microsoft's stream of announcements about upcoming changes to the platform: new features being rolled out, features being changed or replaced, deprecations and their dates, roadmap items moving stages, and security or compliance changes affecting the tenant. Each post has a unique MC identifier and lists which workloads, plans, and roll-out rings are affected. The single most important source for IT teams to track Microsoft 365 platform changes ahead of users seeing them. Available via API, weekly email digest, and the Microsoft 365 Admin mobile app.