Showing results for 2025 - Microsoft 365 Developer Blog

Aug 29, 2025
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Microsoft Graph Toolkit retirement

Ben Summers
Ben Summers

We are announcing the deprecation of the Microsoft Graph Toolkit (MGT). The retirement period begins September 1st, 2025 with full retirement planned for August 28th, 2026. Why we’re retiring this toolkit We introduced the Microsoft Graph Toolkit (MGT) to simplify the developer experience when building web applications that connect to Microsoft G...

Microsoft 365 DeveloperMicrosoft Graph
Aug 29, 2025
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Microsoft Graph CLI retirement

Ben Summers
Ben Summers

We are announcing the retirement of the Microsoft Graph command-line interface (CLI). The Microsoft Graph CLI has served as a powerful tool for developers and IT professionals to interact with Microsoft Graph through simple terminal commands—enabling automation, scripting, and streamlined access to Microsoft 365 data and services. As we evolve our ...

Microsoft Graph
Aug 6, 2025
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Dev Proxy v1.0 with new features for building robust AI-powered apps

Waldek Mastykarz Garry Trinder
Waldek,
Garry

Introducing Dev Proxy v1.0, with new language model-specific testing capabilities to help developers build more reliable AI-powered applications by simulating real-world scenarios and tracking resource usage.

Microsoft 365 Developer
Jul 16, 2025
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Bring your own agents into Microsoft 365 Copilot

Daniel Carrasco Bharath Raghunathan
Daniel,
Bharath

Custom Engine Agents now generally available—build and integrate your own AI into the flow of work Microsoft 365 Copilot is redefining how people interact with AI—embedding it directly into the flow of work as the intuitive, natural interface for agents: the ‘UI for AI’ As Copilot becomes the interface for AI in the workplace, we’re seeing grow...

Microsoft 365 Developer
Jun 23, 2025
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Deprecation of MS-APP-ACTS-AS header in Shifts Management Microsoft Graph APIs

Mike Lee
Mike Lee

In app-only access scenarios, Shifts Management Graph APIs previously required the MS-APP-ACTS-AS: userId header to indicate the user on whose behalf the application was acting. However, this conflicted with the Microsoft Graph permission model where there is no signed-in user for app-only access scenarios. To align Shifts Graph APIs with this mode...

Microsoft Graph