Microsoft Microsoft 365 Apps Monthly Enterprise Channel Update Version Version 2512 (Build 19530.20226)
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Update Summary
Version 2512 (Build 19530.20226) includes security updates, a OneNote proofing language improvement, and fixes for Outlook, Excel, PowerPoint, and Word. It also adds the `Office.context.mailbox.ews.diagnostics.getTokenStatusAsync` API for Outlook event-based add-ins.
Update Details
Bug Fixes
- Fixed an issue that could make Microsoft 365 applications unresponsive during profile card-related activities in Excel, PowerPoint, and Word.
- Fixed an issue that sometimes prevented users from opening emails with the Encrypt Only label in Outlook.
- Fixed a rare collaboration-session issue where the latest document changes could be overwritten by another user or device.
New Features
- OneNote now applies the chosen proofing language more consistently across paragraphs when writing in multiple languages.
- Added the
Office.context.mailbox.ews.diagnostics.getTokenStatusAsyncAPI for Outlook event-based add-ins.
Product Information
Vendor: Microsoft
Product: Microsoft 365 Apps
Product type: Other
Platform: Windows
Variant: Monthly Enterprise Channel
Version: Version 2512 (Build 19530.20226)
Vendor information published: Feb 10, 2026
Original release notes: View on vendor site
Published on updatealert.io: Jun 4, 2026
Description: Office productivity applications for business communication and document work.