Microsoft 365 Developer Blog

A developer platform for building collaborative apps for hybrid work

Featured posts

Building Agents for Teams: Turning conversations into outcomes
Jul 14, 2026
Post comments count 2
Post likes count 3

Building Agents for Teams: Turning conversations into outcomes

Joey Glocke

The Microsoft Teams platform mission is to build the best collaborative platform in the world. We want to make it easy for developers to build agents that parti...

Microsoft 365 DeveloperMicrosoft Teams
SharePoint Copilot Apps Now in Public Preview: From Intent to Action in Microsoft 365 Copilot
Jul 9, 2026
Post comments count 0
Post likes count 5

SharePoint Copilot Apps Now in Public Preview: From Intent to Action in Microsoft 365 Copilot

Vesa Juvonen

SharePoint Copilot Apps are now in public preview, introducing a new way to bring guided, action-oriented business experiences into Microsoft 365 Copilot. By co...

Microsoft 365 DeveloperSharePoint FrameworkSharePoint

Latest posts

May 21, 2019
Post comments count 0
Post likes count 0

Microsoft Graph SDK for JavaScript – Updates for May 2019

Darrel Miller

In the run up to Microsoft Build and shortly after we made a significant set of improvements to our JavaScript SDK.

May 20, 2019
Post comments count 0
Post likes count 0

Microsoft Edge WebView for Office Add-ins

Office Extensibility team

Beginning with Office 365 version 16.0.11629 and the first 2019 Windows 10 update, Office Add-ins running on Office 365 for Windows will use an Edge WebView as the runtime.

May 17, 2019
Post comments count 0
Post likes count 0

Microsoft Graph @ Build 2019: Recap

Microsoft Graph team

If you couldn’t make it to Seattle to attend Build in person this year – we’re sorry you weren’t able join us.  You can still check out all the Microsoft Graph content we delivered. 

May 10, 2019
Post comments count 0
Post likes count 0

Messaging Extensions available on mobile devices for Microsoft Teams

Microsoft Teams team

Beginning on May 10th custom messaging extensions will be available on Microsoft Teams for iOS and Android.

May 9, 2019
Post comments count 0
Post likes count 0

MIME format support for Outlook mail and attachments in Microsoft Graph (preview)

Sivaprakash Saripalli

Today we’re excited to announce the release of two highly requested APIs to the Microsoft Graph beta endpoint. These allow you to retrieve the contents of an email message in MIME format and to download file, item attachments in their raw format.

May 9, 2019
Post comments count 0
Post likes count 0

[Outlook add-ins] Check certificate if mailbox.getCallbackTokenAsync starts returning “An internal error has occurred”

Office Extensibility team

Renewing your SSL certificate may help you resolve "An internal error has occurred" errors returned by mailbox.getCallbackTokenAsync.

May 6, 2019
Post comments count 0
Post likes count 0

Microsoft Teams Platform Enhancements for Build 2019

Microsoft Teams team

Microsoft Teams at Build 2019 by Bill Bliss

May 6, 2019
Post comments count 0
Post likes count 0

Build 2019: Microsoft Graph powers the Microsoft 365 platform

Microsoft Graph team

Check out all the latest Microsoft Graph news from Build 2019

May 6, 2019
Post comments count 0
Post likes count 0

Microsoft Authentication Libraries for .NET and JavaScript are now Generally Available!

Microsoft identity platform team

I'm happy to announce that Microsoft Authentication Libraries (MSAL) for .NET and JavaScript are now Generally Available!  MSAL makes it easy for your application to sign in users and get access tokens to securely call protected APIs - from your own APIs to Microsoft Graph.  MSAL enables secure access to data for any Microsoft identity – from personal Microsoft accounts to work or school accounts provided by Azure Active Directory.

Load more posts