Microsoft 365 Developer Blog

A developer platform for building collaborative apps for hybrid work

Ignite 2023: Ushering in the era of Microsoft Copilot extensibility

November 15, 2023 Nov 15, 2023 11/15/23

Ben Summers

We’re very excited to announce the public preview of Copilot extensibility and other updates about our features and capabilities from across the Microsoft 365 platform.

Update to Exchange callback tokens for Outlook add-ins

October 26, 2023 Oct 26, 2023 10/26/23

Akhilesh Shah

Learn how to prepare for the upcoming change to Exchange callback tokens and avoid any disruptions in your Outlook add-ins.

New Office Add-ins entry point available online

August 24, 2023 Aug 24, 2023 08/24/23

Skylar Pan

Use the new add-ins entry point to manage all your Office Add-ins and find the right add-in the AppSource and Office marketplace.

Changes in Export to PDF with sensitivity labeling and encryption in Office Add-ins

July 27, 2022 Jul 27, 2022 07/27/22

Chris Dietsch

Office is shipping a new feature that enables PDFs created from Office using Export to PDF or Save As PDF to retain the source document’s labels or encryption into the output PDF. Office also enables Office Add-in developers to hook into and reuse some or all of Office’s PDF creation code.

What’s new for Office Add-ins at Build 2022

May 25, 2022 May 25, 2022 05/25/22

Office Add-ins team

Get all the new Office Add-ins announcements from Build 2022. These new features will help you create solutions to increase productivity in today’s modern hybrid environment.

Update your Office Add-in Dialog for cross-domain calls

August 27, 2021 Aug 27, 2021 08/27/21

Ricky Kirkham

We have recently implemented a security update to the Office add-in Dialog API that affects cross-domain communication between the dialog and the parent page.

What’s new in Office Platform at Build 2021

May 26, 2021 May 26, 2021 05/26/21

Office Add-ins team

Take a tour of the new features for Excel and Outlook that will help you bring your business solutions more seamlessly into Office.

What’s new for the Microsoft 365 developer at Build 2021

May 25, 2021 May 25, 2021 05/25/21

Office Add-ins team

It's Microsoft Build 2021! This year, we have an exciting set of new features and announcements from across the entire canvas of Microsoft 365 that we’re thrilled to share with you!