serv365.ai
29 Sep 2026
This week in Microsoft 365
33 new Message Center changes this week. The ones that matter:
New changes
Microsoft Purview: Retirement of Data Security Posture Management (DSPM) classic and DSPM for AI classic experiences
MC1481315 ·
impact 5/10 high
·
major
· Microsoft Purview
(Updated) Microsoft Teams: Updates to Teams Events licensing for business, frontline, and education customers
MC1479512 ·
impact 4/10 medium
·
major
· Microsoft Teams
Microsoft Teams: File sharing enabled by default in external (federated) chats
MC1479514 ·
impact 4/10 medium
·
major
· Microsoft Teams
Microsoft Planner: Meeting-created plans will expire after 180 days of inactivity
MC1479508 ·
impact 4/10 medium
·
major
· Planner
Microsoft Word for the web: Retirement of the "@" entity insertion experience on the document canvas
MC1478006 ·
impact 5/10 high
·
major
· Microsoft 365 apps
Microsoft Teams: Removing Copilot from the chat list
MC1477999 ·
impact 5/10 high
·
major
· Microsoft Teams, Microsoft 365 Copilot Chat
Microsoft Agent 365: Simplified Agent 365 CLI setup experience
MC1477186 ·
impact 4/10 medium
·
major
· Microsoft 365 suite
Microsoft OneDrive: New pay-as-you-go storage billing option
MC1477185 ·
impact 4/10 medium
·
major
· Microsoft OneDrive
Act-by dates in the next 30 days
30 Sep
—
Microsoft Viva Engage: Microsoft Entra permissions required for community and membership administration
30 Sep
—
(Updated) Microsoft Exchange Online: Prepare for Exchange Web Services retirement with EWSAllowedAppIDs
01 Oct
—
Microsoft Publisher: Reminder that support ends in October 2026
01 Oct
—
(Updated) Migrate Free/Busy, MailTips, and Calendar Sharing before EWS deprecation
01 Oct
—
Project Online Essentials reaches End of Life on October 1, 2026: Action required
01 Oct
—
(Updated) Microsoft Teams: Update the Teams mobile app to maintain Calendar functionality
01 Oct
—
Microsoft Teams and Google Calendar sync retirement
01 Oct
—
Microsoft Purview | Data Lifecycle Management - Graph API Support for archive mailboxes
Incidents resolved this week
Some users' Exchange Online email messages may not be retrieved when prompting Microsoft 365 Copilot Chat
CW1470765 · Microsoft 365 Copilot Chat
Users may not be able to access Microsoft Viva Glint
MV1481028 · Microsoft Viva
Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations
OP1478558 · Microsoft 365 apps
We're looking into a potential problem impacting Microsoft 365 Copilot Chat
CW1480927 · Microsoft 365 Copilot Chat
Some users may be unable to access or receive prompt responses with Microsoft 365 Copilot Chat or Copilot Notebooks
CW1478470 · Microsoft 365 Copilot Chat
Admins and users may be unable to access or utilize multiple features within some Microsoft 365 services
MO1479564 · Microsoft 365 suite
Reaching GA this month
Microsoft Teams: Local PTZ for Microsoft Teams Rooms on Windows
Planner: Refreshed experience and new capabilities
Planner: Refreshed experience and new capabilities
Microsoft Copilot (Microsoft 365): Engage prospects faster with Sales Agent-enriched leads
OneNote: Multimodal capture in Copilot Notebooks (Android)
Microsoft Purview: Permissions audit log improvements
Microsoft Teams: Language selection by users in Teams Rooms on Android
Microsoft Copilot (Microsoft 365): Planner capabilities in Copilot chat (M365 Copilot)
From Microsoft
NeedyMantis: Unpacking a post-compromise malware family used in targeted operations
— Microsoft Security Blog
Storm-3168: Agentic-driven cloud attacks using compromised service principals
— Microsoft Security Blog
Introducing the new Copilot with Home, Code and Autopilot
— Microsoft 365 Blog
Ship agents faster with expanded model choice, voice agents, and continuous optimization
— Azure Blog
What’s new in Microsoft Security: September 2026
— Microsoft Security Blog
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