WEEKLY BRIEFING · 15 DEC – 21 DEC 2025 · UTC
Full source inventory · public sources only
Week 51 sources
Microsoft published 6 Windows KB releases (6 out-of-band). No new MSRC release that week. 4 roadmap changes, led by Microsoft 365 Copilot (3) and Exchange (1). 3 lifecycle milestones fall in the next 30 days. 6 Azure updates. 6 Windows and security articles from Microsoft blogs.
6Windows KB releases
4Roadmap changes across 2 products
6Windows and security articles
Windows releases6
- Windows 10, version 1607 — KB5074974 (OOB), build 14393.869218 Dec
- Windows 10, version 1809 — KB5074975 (OOB), build 17763.814818 Dec
- Windows 10, version 21H2 — KB5074976 (OOB), build 19044.669318 Dec
- Windows 10, version 22H2 — KB5074976 (OOB), build 19045.669318 Dec
- Windows Server 2016 — KB5074974 (OOB), build 14393.869218 Dec
Windows and security news6
Lifecycle milestones in the next 30 days3
- End of support · 3 products: Advanced Threat Analytics 1.X; Dynamics CRM 2016 (Dynamics 365); Visual Studio 2022 , Version 17.10 (LTSC channel) 13 Jan
Product news28
Microsoft Graph · 16
- Teamwork and communications (v1.0): 8 API change passages18 Dec
- Device and app management (beta): 2 API change passages18 Dec
- Files (beta): 3 API change passages18 Dec
13 more
- Device and app management (v1.0): 3 API change passages18 Dec
- Teamwork and communications (v1.0): 9 API change passages17 Dec
- Identity and access (beta): 2 API change passages16 Dec
- Identity and access (v1.0): 2 API change passages16 Dec
- Personal contacts (beta): 3 API change passages16 Dec
- Device and app management (v1.0): 4 API change passages16 Dec
- Calendars (v1.0): 10 API change passages16 Dec
- Identity and access (v1.0): 1 API change passage15 Dec
- Files (v1.0): 1 API change passage15 Dec
- Files (v1.0): 12 API change passages15 Dec
- Device and app management (v1.0): 2 API change passages15 Dec
- Device and app management (beta): 2 API change passages15 Dec
- Device and app management (v1.0): 1 API change passage15 Dec
OpenAI · 3
- Added gpt-image-1.5 and chatgpt-image-latest to the Responses API image generation tool.19 Dec
- Released gpt-image-1.5 and chatgpt-image-latest, our latest and most advanced models for image generation.16 Dec
- Released four new dated audio snapshots.15 Dec
Google Gemini · 2
- Introduced a breaking change to the Interactions API in v1beta.19 Dec
- Launched Gemini 3 Flash Preview, gemini-3-flash-preview, delivering fast frontier-class performance that rivals larger models at a fraction of the cost.17 Dec
Azure · 1
- Azure Policy: Required Actions for Docker Content Trust Deprecation in Azure Container Registry17 Dec
Azure CLI · 1
- Azure CLI 2.66.217 Dec
Defender · 1
GitLab · 1
- GitLab 18.718 Dec
Global Secure Access · 1
Windows · 1
Windows 365 · 1
Azure updates6
- Public Preview: Azure Blob-to-Blob migration made simple with Azure Storage Mover18 Dec
- Public Preview: Service Bus SDK type bindings in Azure Functions for Node.js17 Dec
- Generally Avaailable: Azure SQL updates for early December 202517 Dec
- Public Preview: Use Azure SRE Agent with Azure Cosmos DB17 Dec
- Generally Available: Azure NetApp Files cross-zone-region replication (CZRR)16 Dec
Microsoft 365 roadmap4
Microsoft 365 Copilot · 3
- Microsoft Copilot (Microsoft 365): Recommended Notebooks in Copilot Notebooks19 Dec
- Microsoft Copilot (Microsoft 365): Suggested References in Copilot Notebooks19 Dec
- Microsoft Copilot (Microsoft 365): [Copilot Chat] Agent mode in Word enables conversational support to create, edit and refine document content from chat19 Dec
Exchange · 1
Other public updates29
- Teams admin center: Auto‑updates for Teams Android device firmware and apps will be paused during year‑end holidays19 Dec
- Microsoft Purview | Insider risk management- Insider risk management for risky agents19 Dec
- OpenAI's GPT-Image-1.5 model is now available in Microsoft 365 Copilot19 Dec
- Teams admin center: Messaging safety defaults changing to "On" by default19 Dec
- Chat history landing page: Filtering UI refresh19 Dec
24 more
- Microsoft Defender for Office 365: Admins can block external users in Microsoft Teams from Defender Portal19 Dec
- Outlook: New and improved People Hub on Web18 Dec
- Microsoft Teams: Select multiple messages to forward18 Dec
- Learning Activities now available in Microsoft 365 Education and Copilot18 Dec
- Microsoft Purview: Role management update18 Dec
- Microsoft Purview | Data Security Investigations – Introducing new purge mitigation action18 Dec
- Take Action: Out-of-band update to address MSMQ service issues leading to queue operations and resource-related errors18 Dec
- Microsoft 365 Copilot: Nine new connectors now generally available17 Dec
- Microsoft SharePoint Online: Email customization for site access review from Data Access Governance reports17 Dec
- Microsoft Outlook: Wait on Send for Data loss Prevention17 Dec
- Dynamics 365 Contact Center – Evaluate closed conversations with Quality Evaluation Agent17 Dec
- Migrate User Data Across Tenants: Mailboxes, OneDrives, and Teams Chats16 Dec
- Microsoft Purview | Data Loss Prevention - Mac device and device group based policy scoping support for Endpoint DLP16 Dec
- Microsoft Entra: Cross-tenant security group synchronization16 Dec
- Site attestation policy is now generally available16 Dec
- Updates available for Microsoft 365 Apps for Current Channel16 Dec
- Chat visibility in the Microsoft 365 Copilot App15 Dec
- Express voice enrollment in Microsoft Teams15 Dec
- Microsoft Teams: Apps now supported in Private Channels15 Dec
- Microsoft Purview | Endpoint Data Loss Prevention - Show customized message or hyperlink for multiple file toast15 Dec
- Retirement of featured links on SharePoint Start Page15 Dec
- New permissions report available in SharePoint admin center15 Dec
- Deprecation of Designer bot and Designer banners in Teams15 Dec
- Exchange Online ActiveSync device support update15 Dec
Every line opens its detail page or the original Microsoft source. This briefing uses public sources only and says nothing about your tenant or devices.