Microsoft 365 users on Windows are getting regular updates packed with new features, bug fixes, and security patches. If you’re a subscriber, you’re probably already seeing these improvements roll out. Staying on top of what’s new can be tricky, so here’s a quick rundown of the latest updates from Microsoft, starting with the newest.

Recent Updates and What They Bring

The newest update, version 2604 (Build 19929.20090), was released on April 21, 2026. Microsoft says it includes various fixes to improve how Office works and performs overall. While there aren’t specific features highlighted in this build, it’s always good to get these updates to keep everything running smoothly and securely.

Just a week earlier, on April 14, 2026, Microsoft released version 2603 (Build 19822.20182). One of the biggest highlights here is that Copilot can now help you edit PowerPoint slides. It can start a new presentation, build on an existing one, generate slides, update content, and even improve layouts—all while keeping your branding intact. Along with these new capabilities, Microsoft fixed several security issues in this update, so applying it promptly is recommended.

On April 9, 2026, Microsoft released another update, version 2603 (Build 19822.20168), mainly fixing bugs. One notable fix resolves an issue in Outlook where users couldn’t close the Copilot chat pane using the keyboard. Now, you can close it by navigating to the close button or using a shortcut, making it more user-friendly.

Security and Bug Fixes in Recent Builds

Security updates are a crucial part of these releases. For example, the update on March 10, 2026, in version 2602 (Build 19725.20172), added a new chat feature called agent mode in Word. This lets you have a conversation with a virtual assistant to help create, edit, or refine your document. It also fixed a bug where certain extended characters in calendar items appeared as question marks and patched several security holes.

Similarly, on February 10, 2026, Microsoft rolled out another update, version 2601 (Build 19628.20204), fixing issues like Outlook not opening emails labeled “Encrypt Only” and closing bugs across Office apps. These kinds of updates help keep your data safe and your Office apps running without hiccups.

On the security front, many updates come with patches for vulnerabilities. For instance, updates in late January 2026 addressed bugs that caused Office applications to freeze or become unresponsive during certain activities, like profile card interactions. Microsoft recommends applying these security updates quickly to protect your system.

Older Updates and Ongoing Improvements

Earlier in the year, in January 2026, Microsoft released several builds, including version 2512, which fixed bugs such as Office apps hanging during profile activities and made OneNote’s proofing language apply more consistently. These smaller bug fixes help improve overall stability and usability.

Back in December 2025, updates addressed issues like Excel, PowerPoint, and Word crashing during profile-related tasks, along with security patches. Each update aims to make Office more reliable, secure, and easier to use.

Throughout last year, Microsoft kept rolling out these updates roughly every few weeks, focusing on fixing bugs, improving performance, and tightening security. They also added features like better language support in OneNote and new chat capabilities in Word.

Getting these updates is important, especially the security patches, which protect your data and prevent malicious threats. Microsoft recommends applying updates soon after they’re available and watching for any reports of issues. Usually, if everything looks good after a few weeks, it’s safe to fully update your Office apps.

Staying current with Microsoft 365 updates means you get the latest features and the best protection. Keep an eye out for new releases, and don’t hesitate to update your Office apps regularly to enjoy a smoother, safer experience.

Inspired by

• https://www.computerworld.com/article/1710697/office-365-a-guide-to-the-updates.html

Sources

• gmpg.org
• microsoft365.com
• microsoft.com
• microsoft.com
• microsoft.com