MC1479509 - Spell check before sending emails in new Outlook

Microsoft 365 Message Center announcement MC1479509.

MS Message Center's Summary

Microsoft is introducing an automated spell check capability for the new Outlook and web version. This feature prompts users to verify spelling before messages are dispatched. The rollout starts globally in October 2026 and concludes by December 2026. Administrators should review internal support documentation to ensure help desks are prepared to assist users with this new composition setting.

Administrator impact
No direct administrator action is required.
End user impact
Users will have the option to enable automatic spelling verification before sending emails.
Importance
2/10: This is a minor user facing feature update that requires no administrative configuration.

Microsoft Summary

New Outlook will offer automatic spell check before sending emails, rolling out worldwide from mid-October to mid-December 2026. Users can enable this feature to reduce spelling errors without manual checks. No admin action is needed; update user guidance accordingly. No compliance issues identified.

Message Center ID
MC1479509
Category
plan For Change
Severity
normal
Services
Exchange Online
Tags
Feature update, User impact
Published
2026-09-25
Last updated
2026-09-25
Expires
2026-11-30

[What and Why:] If you don’t want to check spelling manually for every message—or you’re worried you might forget!—you can set Outlook to check spelling for you every time before sending emails. [Rollout Schedule:] General Availability (Worldwide): We will begin rolling out on mid November 2026 and expect to complete by early December 2026. Targeted Release (Worldwide): We will begin rolling out on mid October 2026 and expect to complete by late October 2026. General Availability (GCC): We will begin rolling out on mid November 2026 and expect to complete by mid December 2026. General Availability (GCC High): We will begin rolling out on mid November 2026 and expect to complete by mid December 2026. General Availability (DoD): We will begin rolling out on mid November 2026 and expect to complete by mid December 2026. [Impact on Your Organization:] Who is affected: Users of new Outlook for Windows and Outlook on the web. Help desk and training teams that support Outlook messaging experiences. Platforms/Services: Exchange Online. New Outlook for Windows and Outlook on the web. What will happen: Users can configure Outlook to check spelling automatically before sending email. This can help reduce spelling mistakes in sent messages without requiring users to manually start spell check for each message. The capability will roll out automatically during the scheduled rollout window. [Action Required/Recommendations:] No admin action is required. Inform users that they can enable spell check before sending if they want Outlook to review spelling automatically. Update internal Outlook training or help desk guidance if it describes message composition settings. [Compliance considerations:] No compliance considerations identified. Review as appropriate for your organization.