Microsoft Microsoft 365 Apps Monthly Enterprise Channel Update Version Version 2604 (Build 19929.20264)

Microsoft Office security updates for Microsoft 365 Apps Monthly Enterprise Channel Version 2604 (Build 19929.20264). The article also notes various fixes to functionality and performance.

• Security updates included in Microsoft Office updates.

• Various fixes to functionality and performance.

• Support for Office 2019 ended on October 14, 2025.
• This release note applies to Microsoft 365 Apps for enterprise and business, plus several Office editions across supported channels.

• Microsoft Office security updates release notes
  https://support.microsoft.com/office/release-notes-for-microsoft-office-security-updates-8f3c2f0f-4f2f-4f1d-9f0d-0f0f0f0f0f0f

Product Information

Vendor: Microsoft

Product: Microsoft 365 Apps

Product type: Other

Application category: Business

Platform: Windows

Variant: Monthly Enterprise Channel

Version: Version 2604 (Build 19929.20264)

Vendor release date: Jul 14, 2026

Published on updatealert.io: Jul 16, 2026

Description: Office productivity applications for business communication and document work.