GCC High Priority Update
Week of March 5, 2026
Microsoft Purview is enhancing Activity Explorer to provide greater visibility into sensitive data flagged in Exchange Online. With this update, administrators will be able to preview email attachments directly within Activity Explorer without needing to download the message. Previously, only the email body was viewable, limiting insight into the full scope of flagged content. This improvement allows compliance and security teams to investigate potential data exposure more quickly while keeping sensitive content within governed review workflows. The feature has launched for GCC and GCC High environments.
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 March 5, 2026.
Outlook: Show teammates’ calendars in the left navigation pane
Users can now see their teammates’ calendars (including peers, direct reports, and managers) automatically displayed in the left navigation pane of the new outlook. #newoutlookforwindows
ID: 495468 Release: Outlook – Worldwide (Standard Multi-Tenant), GCC, GCC High, DoD Tags: March CY2026
Microsoft 365 app: Microsoft Places Support to GCCH and DoD
“Microsoft Places is an AI-powered workplace app for flexible work. Places helps organizations reimagine flexible work with AI, enables employees to connect more easily in person so that they can make the most of in-office days.
ID: 497998 Release: Microsoft 365 – GCC High, DoD Tags: March CY2026
Microsoft Teams: Live transcription in Teams Rooms on Android
View and control live transcription during a meeting from a Teams
Rooms on Android device. The real-time transcript includes speaker names and
timestamps. You can adjust settings such as spoken language, translated
language, and whether both original and translated transcripts are displayed
side by side on the front of room display. This feature is available in Teams Rooms Pro.
ID: 555234 Release: Microsoft Teams – Worldwide (Standard Multi-Tenant), GCC High Tags: April CY2026
Microsoft Defender for Office 365: Localized Default Mark and Notify Email Template
Enabling localization for the default Mark and Notify email template used in admin review and automation flows for user reported messages. This ensures end users receive review outcome notifications in their preferred language, improving understanding, trust, and participation in email reporting within Microsoft Defender for Office 365.
ID: 557558 Release: Microsoft Defender for Office 365 – Worldwide (Standard Multi-Tenant), GCC, GCC High, DoD Tags: April CY2026
SharePoint: New SharePoint Home site experience
SharePoint home sites are getting the following new updates – A resources web part, a new UX to customize the SharePoint app (Viva Connections) experience for Teams desktop and mobile and ability to set up a new home site in the SharePoint admin center. Additionally, Announcements web part and a new layout for News web part will be available in all sites.
ID: 557983 Release: SharePoint – Worldwide (Standard Multi-Tenant), GCC, GCC High Tags: April CY2026
SharePoint: Updates to News page in SharePoint sites
The News page renders news items in a given site. It is typically accessed via the “see all” experience of a news web part. We are updating the user experience of this page and bringing in Copilot capabilities to licensed users. Updated February 9, 2026: GA rollout for this item is starting in late February. We apologize for any inconvenience.
ID: 499654 Release: SharePoint – Worldwide (Standard Multi-Tenant), GCC, GCC High, DoD Tags: February CY2026
Microsoft Teams: New SlimCore-based optimization for Microsoft Teams in VDI – support for MacOS on Citrix and Azure Virtual Desktops/Windows 365
This feature allows MAC endpoints to optimize Microsoft Teams in VDI environments with the new SlimCore-based media engine, providing an expanded feature set and multiple improvements in quality, reliability and performance.
ID: 502524 Release: Microsoft Teams – Worldwide (Standard Multi-Tenant), GCC, GCC High, DoD Tags: February CY2026
Microsoft Teams: New SlimCore-based optimization for Microsoft Teams in VDI – support for Windows endpoints on Omnissa environments
This feature allows Windows endpoints to optimize Microsoft Teams in VDI environments with the new SlimCore-based media engine, providing an expanded feature set and multiple improvements in quality, reliability and performance.
ID: 518286 Release: Microsoft Teams – Worldwide (Standard Multi-Tenant), GCC, GCC High, DoD Tags: February CY2026
SharePoint: Site Branding Governance via PowerShell
Empower tenant admins to centrally manage SharePoint site branding using PowerShell scripts. This feature enables organizations to enforce consistent branding, apply enterprise themes to individual sites, disable custom branding on specific sites, and audit branding changes – ensuring branding compliance and a unified brand experience across all SharePoint sites.
ID: 526794 Release: SharePoint – Worldwide (Standard Multi-Tenant), GCC, GCC High, DoD Tags: February CY2026
Microsoft Purview: Data Loss Prevention-User based alert aggregation
User-Based Aggregation consolidates DLP alerts by user identity i.e. a DLP rule violations, in a specified aggregation time window, of the same rule and single user will be aggregated into a single alert enabling quicker triage and remediation. Instead of reviewing alerts containing rule match events of multiple users, DLP admin can now analyze grouped DLP rule match events per user, gaining insights into repeated policy violations and anomalous behavior.
ID: 537276 Release: Microsoft Purview – GCC, GCC High, DoD Tags: February CY2026
Microsoft Teams: Choose Your Enter Key Behavior in Teams Chat
Microsoft Teams now gives you control over how the Enter key works when composing messages. You can choose whether pressing Enter sends your message or starts a new line—making it easier to write longer messages without accidental sends.
ID: 537279 Release: Microsoft Teams – Worldwide (Standard Multi-Tenant), GCC, GCC High, DoD Tags: February CY2026
Outlook: One-step folder sharing
Today, sharing a folder requires manually sharing each parent folder in the hierarchy. Outlook will simplify this by allowing users to share a folder in a single step, automatically applying the required permissions to its parent folders. Before sharing, users will clearly see which folders (including parent folders) will be shared. This removes manual effort while keeping users informed and in control.
ID: 557680 Release: Outlook – GCC, GCC High, DoD Tags: June CY2026
Microsoft Purview compliance portal: Insider Risk Management – Administrative units support
Administrative units allow admins with appropriate permissions to subdivide the organization into smaller units, and then assign specific admins or role groups that can manage only the members of those units. For example, German administrators can only create/manage policies for only German users, and German investigators can only investigate alerts and activities from only German users.
Microsoft Purview Insider Risk Management correlates various signals to identify potential malicious or inadvertent insider risks, such as IP theft, data leakage, and security violations. Insider Risk Management enables customers to create policies based on their own internal policies, governance, and organizational requirements. Built with privacy by design, users are pseudonymized by default, and role-based access controls and audit logs are in place to help ensure user-level privacy.
ID: 422503 Release: Microsoft Purview – GCC, GCC High, DoD Tags: February CY2026
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 – GCC, GCC High, DoD Tags: February CY2026
Outlook: New search folder types
Search folders are being moved to the Settings experience in the new Outlook for Windows and web, improving discoverability and alignment with modern organization workflows. In addition, we are expanding supported search folder types, including mail with attachments, old mail, and large mail and more. Users will also gain the ability to filter search folders by specific folders, providing more precise control over how email is organized and surfaced. #newoutlookforwindows
ID: 549287 Release: Outlook – GCC, GCC High, DoD Tags: March CY2026