M365 Archive

Microsoft 365 Message Center Archive

A fast, searchable archive of Microsoft 365 Message Center announcements and Roadmap items. Track tenant-relevant changes, rollout dates, and service updates.

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MessageActions
MC1243549Major
Retirement of SharePoint One-Time Passcode (SPO OTP) and transition to Microsoft Entra B2B
Mar 4, 2026|SharePoint Online
MC1301714
Microsoft Purview | Data Loss Prevention- DLP to restrict processing external emails in M365 Copilot and Copilot Chat
May 5, 2026|Microsoft Purview
RM567893
Microsoft Viva: Copilot Analytics - Agent 365 dashboard for managers
Jul 17, 2026|Microsoft Viva
RM567890
Microsoft Purview: Information Protection - Auto-labeling scale increase for SharePoint and OneDrive
Jul 17, 2026|Microsoft Purview
RM567888
Outlook: All Day events to show up more clearly in the Mail module Calendar Preview
Jul 17, 2026|Outlook
RM567884
Microsoft Teams: External phone call routing (GCC High, DoD)
Jul 17, 2026|Microsoft Teams
RM567670
Microsoft Copilot (Microsoft 365): Use Agent 365 agents within Microsoft 365 Copilot Chat and Declarative Agents
Jul 17, 2026|Microsoft Copilot (Microsoft 365)
RM567304
Microsoft Teams: Explicit recording and transcription consent for PSTN participants now available in GCC High and DoD
Jul 16, 2026|Microsoft Teams
RM567469
Microsoft Teams: PowerPoint Live Light theme support
Jul 14, 2026|Microsoft Teams
RM567315
Planner: Capabilities in Microsoft Cowork
Jul 7, 2026|Planner
RM565870
Microsoft Purview: Data Loss Prevention - Data Loss Prevention to safeguard sensitive information from external web search in Microsoft 356 Copilot and Copilot Chat
Jun 26, 2026|Microsoft Purview
RM560320
Microsoft Teams: Breakout rooms up to 1,000 Attendees in Teams meetings
Apr 15, 2026|Microsoft Teams
RM557970
Microsoft Teams: Centralized notification settings for channels
Feb 27, 2026|Microsoft Teams
RM557255
Microsoft Purview: Data Loss Prevention to prevent Microsoft 365 Copilot processing content with sensitivity labels supports all storage locations
Feb 13, 2026|Excel
RM547834
Microsoft Teams: Events in Meet app in Teams
Feb 4, 2026|Microsoft Teams
RM542181
Microsoft Copilot (Microsoft 365): Agent Mode in Excel for GCC
Dec 17, 2025|Excel
RM522096
Microsoft Purview: Integration with Entra GSA Internet Access to enable sensitive file filtering at the network layer
Oct 30, 2025|Microsoft Information Protection
RM503553
Microsoft 365 Admin Center: Authoritative content management for Microsoft 365 Copilot Search
Sep 25, 2025|Microsoft 365 admin center
MC1431377
Microsoft Defender for Office 365: AIR Investigation Experience Improvements
Jul 17, 2026|Microsoft Defender XDR
MC1431365
Copilot Analytics - Agent 365 dashboard for managers
Jul 17, 2026|Microsoft Viva
MC1426708Major
End of support for OneDrive sync app on Windows 10 22H1 and earlier
Jul 13, 2026|Microsoft OneDrive
MC1387814Action by Sep 1, 2026
Microsoft Teams: RTMP-In port and domain changes required
Jun 11, 2026|Microsoft Teams
MC1181769
Microsoft Purview: Integration with Entra GSA Internet Access to enable sensitive file filtering at the network layer
Oct 31, 2025|Microsoft Purview
MC1430536Major
Microsoft Purview: Insider Risk Management - Unified alert queue
Jul 17, 2026|Microsoft Purview
MC1430543
Microsoft Excel: Summarize text columns and generate categories with Copilot
Jul 17, 2026|Microsoft 365 apps
MC1430542
Microsoft Outlook: Collaborate with Copilot while drafting email
Jul 17, 2026|Exchange Online
MC1430540
Find your group sites faster with the new My Sites tab in OneDrive for iOS
Jul 17, 2026|Microsoft OneDrive
MC1430537
Copilot in Excel: Brand Kit skill
Jul 17, 2026|Microsoft 365 apps
MC1430534
Microsoft Purview: Insider Risk Management - Expanding note capabilities across alerts and cases
Jul 17, 2026|Microsoft Purview
MC1430531Major
Microsoft Outlook: Meeting Insight is retiring
Jul 17, 2026|Exchange Online
MC1430530
Microsoft OneDrive: Exclude specific folders from syncing
Jul 17, 2026|Microsoft OneDrive
MC1430529Major
Teams frontline mobile onboarding guide retirement
Jul 17, 2026|Microsoft Teams
MC1430523
Microsoft Teams: Enhanced file filtering in channel Shared tabs
Jul 17, 2026|Microsoft Teams
RM562353
Microsoft Copilot (Microsoft 365): Session and Response Sharing in M365 Copilot
Jul 16, 2026|Microsoft Copilot (Microsoft 365)
RM567470
OneDrive: Exclude specific folders from syncing
Jul 9, 2026|OneDrive
RM566695
OneDrive: Block screen capture for sensitivity-labeled PDFs in the OneDrive and SharePoint web viewer
Jul 1, 2026|OneDrive
RM566703
Microsoft Edge: Upgraded Copilot new tab page
Jun 26, 2026|Microsoft Edge
RM565218
Microsoft Teams: Queues app for Microsoft Teams in GCC High and DoD
Jun 9, 2026|Microsoft Teams
RM565132
Microsoft Teams: Granular channel notification controls
Jun 9, 2026|Microsoft Teams
RM476488
Microsoft Teams: Ability to separate out the Townhall attendee invites
Jan 23, 2025|Microsoft Teams
RM325873
Microsoft Teams: Copilot in Teams can analyze content shared on-screen during a meeting
Nov 20, 2024|Microsoft Copilot (Microsoft 365)
MC1248393
Outlook Mobile: Follow a meeting option
Mar 10, 2026|Exchange Online
MC1338816Major
New Outlook for Windows becomes available for GCC High and DoD
Jun 3, 2026|Exchange Online
MC1426371Major
Microsoft Entra: Passkeys by default and retirement of Microsoft-provided SMS and voice authentication
Jul 13, 2026|Microsoft Entra
MC1388719
Microsoft Teams: Granular channel notification settings
Jun 12, 2026|Microsoft Teams
MC1009930
Microsoft Teams: Distinguish invites among Attendee, Presenter, and Co-organizer emails
Feb 19, 2025|Microsoft Teams
MC796790Major
M365 and Microsoft Teams: Unified management of app and agent availability in Teams, Outlook, and the Microsoft 365 app
May 29, 2024|Microsoft Teams
MC1429683
Dynamics 365 Sales - Teams owned opportunities to be researched by Sales Opportunity Agent
Jul 16, 2026|Dynamics 365 Apps
MC1429626
Power Automate - Visualize desktop flows with flow chart view
Jul 16, 2026|Microsoft Power Automate
MC1429563
Dynamics 365 Customer Service - Next Best Actions with Customer Intent Agent
Jul 16, 2026|Dynamics 365 Apps
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