Name: Microsoft Microsoft 365 Apps Monthly Enterprise Channel
Brand: Microsoft

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 update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Jul 14, 2026

Version 2604 (Build 19929.20264)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Jul 14, 2026

Version 2604 (Build 19929.20264)

Version 2605 (Build 20026.20236) includes security updates and various fixes to functionality and performance for Microsoft 365 Apps on the Monthly Enterprise Channel.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Jul 14, 2026

Version 2605 (Build 20026.20236)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Jul 14, 2026

Version 2605 (Build 20026.20236)

Microsoft Office security update notes for Microsoft 365 Apps Monthly Enterprise Channel Version 2606 (Build 20131.20152). The article also mentions various fixes to functionality and performance.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Jul 14, 2026

Version 2606 (Build 20131.20152)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Jul 14, 2026

Version 2606 (Build 20131.20152)

Version 2605 (Build 20026.20166), Version 2604 (Build 19929.20220), and Version 2603 (Build 19822.20288) were released on 2026-06-09. Version 2605 includes functionality and performance fixes, while Versions 2604 and 2603 include security updates.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Jun 9, 2026

Version 2605 (Build 20026.20166)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Jun 9, 2026

Version 2605 (Build 20026.20166)

Version 2603 (Build 19822.20254) includes various fixes to functionality and performance.

Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 19, 2026

Version 2603 (Build 19822.20254)

Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 19, 2026

Version 2603 (Build 19822.20254)

Version 2602 (Build 19725.20346) includes various fixes to functionality and performance.

Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 15, 2026

Version 2602 (Build 19725.20346)

Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 15, 2026

Version 2602 (Build 19725.20346)

Version 2604 (Build 19929.20172) includes various fixes to functionality and performance.

Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 14, 2026

Version 2604 (Build 19929.20172)

Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 14, 2026

Version 2604 (Build 19929.20172)

Version 2602 (Build 19725.20320) includes security updates for Microsoft 365 Apps. Security updates listed here.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 12, 2026

Version 2602 (Build 19725.20320)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 12, 2026

Version 2602 (Build 19725.20320)

Version 2603 (Build 19822.20240) includes security updates for Microsoft 365 Apps. Security details are listed in the Microsoft 365 Apps security updates page.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 12, 2026

Version 2603 (Build 19822.20240)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 12, 2026

Version 2603 (Build 19822.20240)

Version 2604 (Build 19929.20162) includes security updates and resolves issues in Access and Outlook. Fixes address incorrect datasheet records in SQL Server, Outlook crashes after replying to labeled mail, and meeting update persistence problems.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 12, 2026

Version 2604 (Build 19929.20162)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

May 12, 2026

Version 2604 (Build 19929.20162)

Version 2512 (Build 19530.20282) includes security updates for Microsoft 365 Apps.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Apr 14, 2026

Version 2512 (Build 19530.20282)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Apr 14, 2026

Version 2512 (Build 19530.20282)

Version 2602 (Build 19725.20244) includes security updates for Microsoft 365 Apps. Security updates listed here.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Apr 14, 2026

Version 2602 (Build 19725.20244)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Apr 14, 2026

Version 2602 (Build 19725.20244)

Version 2603 (Build 19822.20180) adds Copilot editing and refinement in PowerPoint for Microsoft 365 Copilot users. It also includes security updates and fixes for Outlook accessibility, PowerPoint stability, and Word Copilot drafting behavior.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Apr 14, 2026

Version 2603 (Build 19822.20180)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Apr 14, 2026

Version 2603 (Build 19822.20180)

Version 2511 (Build 19426.20314) includes security updates for Microsoft 365 Apps. Security updates listed here.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Mar 10, 2026

Version 2511 (Build 19426.20314)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Mar 10, 2026

Version 2511 (Build 19426.20314)

Version 2512 (Build 19530.20260) includes security updates for Microsoft 365 Apps. Security updates listed here.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Mar 10, 2026

Version 2512 (Build 19530.20260)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Mar 10, 2026

Version 2512 (Build 19530.20260)

Version 2602 (Build 19725.20170) adds local file support for Copilot Chat and Excel Agent Mode in modern Excel workbooks, plus Agent mode in Word. It also includes security updates and fixes for OneNote and Outlook.

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Mar 10, 2026

Version 2602 (Build 19725.20170)

Security update Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Mar 10, 2026

Version 2602 (Build 19725.20170)

Version 2602 (Build 19725.20170) adds Copilot Chat and Excel Agent Mode support for local Excel files, plus Agent mode in Word. It also includes security updates and fixes for OneNote crashes and Outlook calendar character rendering.

Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Mar 10, 2026

Version 2602 (Build 19725.20170)

Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Mar 10, 2026

Version 2602 (Build 19725.20170)

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.

Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Feb 10, 2026

Version 2512 (Build 19530.20226)

Microsoft Microsoft 365 Apps Monthly Enterprise Channel

Feb 10, 2026

Version 2512 (Build 19530.20226)

Microsoft Microsoft 365 Apps Monthly Enterprise Channel Updates

Updates for Microsoft Microsoft 365 Apps Monthly Enterprise Channel

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.

Version 2605 (Build 20026.20236) includes security updates and various fixes to functionality and performance for Microsoft 365 Apps on the Monthly Enterprise Channel.

Microsoft Office security update notes for Microsoft 365 Apps Monthly Enterprise Channel Version 2606 (Build 20131.20152). The article also mentions various fixes to functionality and performance.

Version 2605 (Build 20026.20166), Version 2604 (Build 19929.20220), and Version 2603 (Build 19822.20288) were released on 2026-06-09. Version 2605 includes functionality and performance fixes, while Versions 2604 and 2603 include security updates.

Version 2603 (Build 19822.20254) includes various fixes to functionality and performance.

Version 2602 (Build 19725.20346) includes various fixes to functionality and performance.

Version 2604 (Build 19929.20172) includes various fixes to functionality and performance.

Version 2602 (Build 19725.20320) includes security updates for Microsoft 365 Apps. Security updates listed here.

Version 2603 (Build 19822.20240) includes security updates for Microsoft 365 Apps. Security details are listed in the Microsoft 365 Apps security updates page.

Version 2604 (Build 19929.20162) includes security updates and resolves issues in Access and Outlook. Fixes address incorrect datasheet records in SQL Server, Outlook crashes after replying to labeled mail, and meeting update persistence problems.

Version 2512 (Build 19530.20282) includes security updates for Microsoft 365 Apps.

Version 2602 (Build 19725.20244) includes security updates for Microsoft 365 Apps. Security updates listed here.

Version 2603 (Build 19822.20180) adds Copilot editing and refinement in PowerPoint for Microsoft 365 Copilot users. It also includes security updates and fixes for Outlook accessibility, PowerPoint stability, and Word Copilot drafting behavior.

Version 2511 (Build 19426.20314) includes security updates for Microsoft 365 Apps. Security updates listed here.

Version 2512 (Build 19530.20260) includes security updates for Microsoft 365 Apps. Security updates listed here.

Version 2602 (Build 19725.20170) adds local file support for Copilot Chat and Excel Agent Mode in modern Excel workbooks, plus Agent mode in Word. It also includes security updates and fixes for OneNote and Outlook.

Version 2602 (Build 19725.20170) adds Copilot Chat and Excel Agent Mode support for local Excel files, plus Agent mode in Word. It also includes security updates and fixes for OneNote crashes and Outlook calendar character rendering.

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.