Exchange Online Roadmap

As managing vice president, Rob Helm covers Microsoft collaboration services and client software. His 25-plus years of experience analyzing Microsoft’s... more

Exchange Online provides e-mail, calendar, and task management to Microsoft 365 users through Outlook desktop, mobile, and Web applications. It also provides several supporting services for Teams, including calendar management, task storage, and legal hold and retention. It is a mature service that will not change radically, but it will see security and management improvements, and new usage and capacity charges. End user features will continue to arrive, especially in functions required by Teams.

Product: Exchange Online

Licensing: Exchange Server

Near Term

Exchange Online is a mature service that receives relatively few changes. Changes in 2025-2026 improve security, management, and control over capacity usage. Some of the changes could be disruptive, and some could raise costs even as they unblock migrations to Exchange Online (fig. 1).

Avoid Cutoff from Exchange Online in Mar. 2026

All mail systems must add the DigiCert Global Root Certificate G2 to their trust lists by Mar. 15, 2026, or risk being cut off from Exchange Online. For details, see the Directions report “Avoid Cutoff from Exchange Online in Mar. 2026.”

Atlas Members have full access

Get access to this and thousands of other unbiased analyses, roadmaps, decision kits, infographics, reference guides, and more, all included with membership. Comprehensive access to the most in-depth and unbiased expertise for Microsoft enterprise decision-making is waiting.

Membership Options

Already have an account? Login Now