GCC High Priority Update
Week of January 8, 2026
Microsoft Purview is enhancing Activity Explorer with email attachment preview, giving administrators greater visibility into sensitive data flagged in Exchange Online. Previously limited to message body content, Activity Explorer will now allow admins to preview email attachments directly, without downloading files, making investigations faster and reducing the risk of exposing sensitive or controlled information during review. This update is currently in development, with rollout expected in February 2026 for GCC, GCC High, and DoD tenants.
GCC High M365 Roadmap Updates
Find out what’s coming, what’s going, and what it means for you and your operations. View all Microsoft 365 GCC High roadmap updates for the week of January 8, 2026.
Microsoft Purview: Information Protection-Email attachment Preview in Activity Explorer
We’re enhancing Activity Explorer to provide greater visibility into sensitive data flagged in Exchange Online. Previously, only the message body was viewable, which limited insight into flagged content. With this update, admins will be able to preview email attachments directly within Activity Explorer—without needing to download the email.
ID: 543969 Release: Microsoft Purview compliance portal – GCC, GCC High, DoD Tags: February CY2026
Microsoft Teams: Autocorrect in Teams compose
Users will now have commonly misspelled words automatically corrected in compose.
ID: 534487 Release: Microsoft Teams – Worldwide (Standard Multi-Tenant), GCC, GCC High, DoD Tags: January CY2026
Microsoft Purview compliance portal: Insider Risk Management – Experience enhancements to IRM alert investigation workflow
Experience enhancements to IRM alert investigation workflow including updates to the alert’s “”All risk factors”” page and activity explorer. These enhancements will give customers the ability to maximize the visual space for their investigation. We are adding to each component a minimize/ maximize button and hiding the horizontal banner on the Alerts pages by default. We are also enhancing the All Risk Factors page for better UX.
ID: 493755 Release: Microsoft Purview compliance portal – GCC, GCC High, DoD Tags: December CY2025
Microsoft Copilot (Microsoft 365): Model Selector in Microsoft 365 Copilot
The Model Selector in Microsoft 365 Copilot gives users more control over reasoning depth, enabling automatic reasoning for simple tasks and explicit control when desired. The three modes that are supported as part of GPT-5 are: Auto (default) – system decides how long to think, Quick response – answers right away, Think deeper – Thinks longer for better answers.
ID: 532736 Release: Microsoft Copilot (Microsoft 365) – Worldwide (Standard Multi-Tenant), GCC, GCC High, DoD Tags: December CY2025