Microsoft has implemented a feature freeze for Microsoft 365 applications running on Windows 10, effective August 2026. For UK small and medium-sized businesses still operating Windows 10 devices, this marks the beginning of a carefully staged transition that will ultimately require migration to Windows 11 to maintain access to the latest productivity features.
The change affects core business applications including Word, Excel, PowerPoint, Outlook, and Teams.
From August 2026, Microsoft will stop adding new features to Microsoft 365 apps on Windows 10, with key cutoffs varying by update channel: Current Channel ceased in August 2026, Monthly Enterprise Channel ends 13 October 2026, and Semi-Annual Enterprise Channel continues until 12 January 2027, though Microsoft will still deliver security updates through 10 October 2028
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This announcement carries particular significance because it separates feature updates from security updates, creating a nearly two-year window during which Windows 10 systems will remain secure but functionally stagnant for Microsoft 365 applications.
Why Microsoft Is Freezing Windows 10 Microsoft 365 Features in August 2026
Microsoft emphasises the immediate impact of the announced feature freeze for Microsoft 365 apps on Windows 10, noting that as new features stop arriving for that platform, organisations face pressure to plan migrations to Windows 11 if they want the latest experiences and productivity updates
. The move is designed to accelerate Windows 11 adoption across the business user base.
For context, Windows 10 reaches end of support on 14 October 2025 for consumer editions, but extended security updates are available for enterprise and education customers until October 2028. The Microsoft 365 apps feature freeze sits within this extended support period, meaning your Windows 10 devices can remain secure but will gradually fall behind in productivity capabilities.
The practical effect for UK SMEs is straightforward: if your organisation wants access to new Microsoft 365 capabilities—whether that’s improved collaboration features in Teams, enhanced data analysis tools in Excel, or new AI-powered functionality in Word and PowerPoint—you will need to be running Windows 11.
Which Update Channels Are Affected and When
The feature freeze rollout follows different timelines depending on which Microsoft 365 Apps update channel your organisation uses:
- Current Channel: Feature freeze already in effect as of August 2026
- Monthly Enterprise Channel: Feature freeze takes effect 13 October 2026
- Semi-Annual Enterprise Channel: Feature freeze takes effect 12 January 2027
Most UK SMEs use either Current Channel (which receives features as soon as they’re released) or Monthly Enterprise Channel (which provides a predictable monthly update schedule). If you’re uncertain which channel your organisation uses, check the update settings in any Microsoft 365 application under File > Account > Update Options.
Security updates will continue for all channels until 10 October 2028, ensuring that Windows 10 devices running Microsoft 365 apps remain protected against vulnerabilities even after the feature freeze takes full effect.
What “Feature Freeze” Actually Means for Daily Work
A feature freeze does not mean your Microsoft 365 applications will stop working or become unusable. It means:
- Your current versions of Word, Excel, PowerPoint, Outlook, and other apps will continue to function normally
- You will continue to receive monthly security updates and bug fixes
- You will not receive new features, user interface improvements, or functionality enhancements released after the freeze date for your channel
- Compatibility with cloud services and file formats will be maintained, but new cloud-dependent features may not be available
The gap between Windows 10 and Windows 11 feature sets will widen progressively over the next 18 months, making the productivity difference increasingly noticeable.
How This Connects to Other August 2026 Changes UK SMEs Are Managing
The Windows 10 feature freeze is one component of a broader set of changes rolling out across the Microsoft ecosystem this month.
Several premium features are moving to baseline licensing by 1 August 2026, with notable additions including Intune Plan 2 capabilities and Defender for Office 365 Plan 1, plus tools like Intune Remote Help and Cloud PKI
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We covered the inclusion of Microsoft Defender for Office 365 Plan 1 in E3 licences earlier this week—a security upgrade that UK SMEs should enable immediately. If your organisation is running Windows 10, you’ll still be able to access these security improvements through the web-based Microsoft 365 Defender portal, but client-side integrations in Outlook and other apps may eventually require Windows 11.
Similarly, the Windows 11 August 2026 Patch Tuesday update scheduled for 11 August introduces several significant changes that Windows 10 users will not receive, including enhanced security features and system resilience improvements.
Planning Your Windows 11 Migration: What UK SMEs Should Prioritise Now
If your organisation is still running Windows 10 on a significant portion of your device fleet, August 2026 is the right time to begin structured migration planning. Here’s a practical approach:
1. Audit Your Current Windows 10 Estate
Identify which devices are running Windows 10, who is using them, and whether those devices meet Windows 11 hardware requirements. The most common barrier is the Trusted Platform Module (TPM) 2.0 requirement—many devices manufactured before 2018 lack compatible TPM chips.
You can check compatibility using Microsoft’s PC Health Check tool, available from the official Windows 11 specifications page. Run this across your fleet to understand the scale of hardware replacement required.
2. Prioritise Devices by User Role and Business Impact
Not every device needs to be upgraded immediately. Consider:
- High priority: Users who rely heavily on Microsoft 365 collaboration features, particularly Teams, SharePoint, and cloud-based workflows
- Medium priority: General office workers using Word, Excel, Outlook for daily tasks
- Lower priority: Devices used for specialised applications that may have compatibility concerns with Windows 11, or systems nearing planned replacement cycles
This phased approach allows you to test Windows 11 in production with a smaller user group before rolling out more broadly.
3. Test Business-Critical Applications on Windows 11
Before committing to a large-scale migration, verify that your essential line-of-business applications, accounting software, CRM systems, and industry-specific tools function correctly on Windows 11. Many vendors have already certified their applications for Windows 11, but testing with your specific configurations is essential.
If you discover compatibility issues, engage with vendors now to understand their Windows 11 support roadmaps. Some older applications may require updates or replacements.
4. Budget for Hardware Replacement Where Necessary
Devices that cannot be upgraded to Windows 11 due to hardware limitations will need replacement before October 2028, when security updates for Windows 10 cease entirely. Spreading this capital expenditure across 2026 and 2027 may be more manageable than a rushed replacement programme in late 2028.
For Kent-based SMEs, this creates an opportunity to modernise your device estate with current-generation hardware that will remain supported well into the 2030s.
What Happens If You Continue Running Windows 10 Through 2027 and Beyond
Continuing to operate Windows 10 devices is viable in the short term, particularly for organisations with extended support agreements in place. However, the long-term implications become increasingly problematic:
- Productivity gap: Your team will lack access to new Microsoft 365 features that competitors using Windows 11 can leverage
- Recruitment and retention: Skilled employees increasingly expect modern tools; outdated software can affect morale and hiring competitiveness
- Support complexity: Managing a mixed Windows 10/Windows 11 estate increases IT support overhead and testing requirements
- October 2028 cliff edge: When security updates cease entirely, any remaining Windows 10 devices become significant security liabilities
The UK Cyber Security Breaches Survey 2025/2026 shows that 43% of businesses experienced cyber incidents—running unsupported operating systems dramatically increases that risk.
How Meridian Micro Can Support Your Windows 11 Migration
Planning and executing a Windows migration requires careful coordination of hardware assessment, application testing, data migration, user training, and ongoing support. For Kent and South East businesses managing this transition, Meridian Micro provides:
- Comprehensive device compatibility audits to identify which systems can upgrade and which require replacement
- Structured migration planning that minimises disruption to daily operations
- Application testing and compatibility verification for your business-critical software
- Phased deployment programmes that allow controlled rollout with fallback options
- Post-migration support to address any configuration or performance issues
We’re based in Saltwood, Hythe, and serve SMEs throughout Kent and the South East with practical, business-focused IT guidance that prioritises operational continuity.
If your organisation is still running Windows 10 and you’re uncertain about the best migration approach for your specific circumstances, call our team on 01303 883111 to discuss a structured upgrade plan that aligns with your budget cycles and business priorities. The August 2026 feature freeze creates a clear timeline—now is the time to plan rather than react.