Microsoft Will Add New Outlook Spell Check in October
The update adds manual toggle controls for New Outlook users and new AI-driven insight features for Outlook Classic.
Updated on Sept. 26, 2026 in Remote Work
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Beginning in October 2026, Microsoft will introduce an automatic spell check feature to New Outlook and a User Initiated Insights tool to Copilot in Outlook Classic. These features aim to reduce email errors and provide users more control over AI-assisted writing.
Why it matters
These tools address common operational friction points by preventing typos in professional correspondence and allowing more intentional use of AI. By segmenting features between versions, the update shifts how teams interact with communication tools based on their version of the software.
Microsoft is rolling out two major feature updates across its email ecosystem starting in October 2026, with the New Outlook spell check reaching wide availability by mid-December 2026. The updates impact all users of the respective platforms, though Outlook Classic will not receive the spell check toggle.
The players
Microsoft
A global technology company that develops the Windows operating system, the Azure cloud platform, and the ubiquitous Microsoft 365 productivity suite.
The details
In New Outlook, users will gain the ability to enable an automatic spell check feature directly through the Settings menu to catch typos before hitting send. Meanwhile, Outlook Classic users will gain a User Initiated Insights feature via Copilot, which triggers when a user highlights text and selects an 'Explain this' command. This approach allows users to control precisely when the AI interacts with their email content rather than relying on automated prompts.
Timeline
May 2026: Microsoft began testing User Initiated Insights in Outlook Classic.
October 2026: The automatic spell check toggle and Copilot insights feature begin rolling out.
Mid-December 2026: The automatic spell check feature for New Outlook becomes widely available.
Market Landscape
This rollout marks a continuation of the ongoing transition from Outlook Classic to New Outlook within corporate IT environments. By layering AI-driven insights onto the legacy platform, the company is bridging the gap between established user habits and newer, modernized software interfaces.
IT managers should prepare for potential user requests to enable these features once the October rollout begins. Review your current software deployment policies to determine if users will require administrative access or guidance to toggle these new writing assistance tools.
The takeaway
Operational efficiency in email relies on balancing automation with user oversight. Mark your calendar for October 2026 to evaluate if these specific spelling and AI-insight features improve the quality of external-facing communications within your organization.
Further reading
For broader trends in enterprise software, see the Remote Work section.
Source note: This article includes information reported by Windows Latest.
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