Microsoft 365
The latest Microsoft 365 coverage — news, analysis, and updates from the WindowsNews.AI desk.
Claude Sonnet 4 Slots into Word and Excel as Microsoft Rethinks Copilot’s AI Backend
Microsoft is integrating Anthropic’s Claude Sonnet 4 models into Microsoft 365 Copilot, bringing them directly into Word, Excel, PowerPoint, and Outlook, according to reports from The Information...
Microsoft Adds Anthropic's Claude Sonnet to Copilot, Diversifying Office AI Models
Microsoft’s Office suite has long been the bedrock of enterprise productivity, and its AI-powered Copilot features have been virtually synonymous with OpenAI’s models. That is about to change....
Microsoft Pays Anthropic to Add Claude Sonnet 4 as Copilot's Second AI Brain in Office 365
Microsoft is paying Anthropic to integrate its Claude AI models directly into Office 365 applications, marking the first time the productivity suite will officially route user prompts to a large...
Satya Nadella’s 5 Copilot Prompts Turn Microsoft 365 into an AI Leadership Engine
Microsoft’s quiet integration of GPT‑5 into its Copilot family on August 7, 2025, was not just a routine model bump — it was the engineering unlock that turned a handful of brief, repeatable...
Windows 10’s KB5065429 Update Opens the Consumer ESU Enrollment Door as End of Support Nears
Microsoft has pushed out KB5065429, the September 2025 cumulative update for Windows 10 22H2, and it arrives as more than just a standard security rollup — it’s the key that unlocks the consumer...
Microsoft Taps Anthropic's Claude Sonnet 4 to Power Copilot in Office 365, Breaking OpenAI Exclusivity
Microsoft is quietly engineering the most significant shift in its Office AI strategy since Copilot launched: the company is adding Anthropic's Claude models to the backend mix, specifically routing...
Microsoft Integrates Anthropic's Claude Sonnet 4 into Office 365 for Multi-Model AI
Microsoft is preparing to integrate Anthropic’s Claude Sonnet 4 models into its Office 365 productivity suite, marking a decisive break from exclusive reliance on OpenAI technology in key...
Microsoft Integrates Anthropic Claude and MAI Models into Office 365 Copilot
Microsoft has begun integrating Anthropic’s Claude models into its Office 365 Copilot, a move that explicitly ends the company’s near-exclusive reliance on OpenAI and reshapes the AI assistant...
Microsoft Injects Anthropic's Claude Into Office 365 to Reduce OpenAI Dependency
Microsoft is preparing to integrate Anthropic's Claude models into Office 365, according to multiple reports, a move that would break OpenAI's monopoly on the AI back-end for Copilot features in...
Claude Sonnet 4 Lands in Microsoft 365 Copilot, Upending OpenAI Partnership
Microsoft is breaking its exclusive reliance on OpenAI for Copilot's brainpower, integrating Anthropic's Claude Sonnet 4 into Microsoft 365 to power productivity tasks like slide generation and...
Microsoft Imposes 3-Day Office Mandate, Puget Sound First in Phased 2026 Rollout
Microsoft will require thousands of employees living within 50 miles of a company office to work onsite at least three days a week, the company announced this week, setting a February 2026 compliance...
Excel CVE-2025-54901: Patch Now for Critical Memory Disclosure, Mac Users Wait
Microsoft has released emergency security updates to patch a significant information-disclosure vulnerability in Microsoft Excel, tracked as CVE-2025-54901, that can expose sensitive process memory...