The September security and rollup update has been made available for all Click-to-Run installations of Outlook 2016, Outlook 2019, Outlook 2021, Outlook 2024, and Outlook as part of a Microsoft 365 subscription.
It contains 5 security updates for Excel (1), Visio (1), and Shared Office Components (3).
In addition, it contains 2 non-security fixes related to Outlook Current Channel Version 2409, and 4 fixes related to both Outlook Monthly Enterprise Version 2408 as well as Semi Annual Preview Version 2408.
- Version 2409
- We fixed an issue that caused users in hybrid environments to be unable to apply labels to emails.
- Version 2408
- We fixed an issue that caused the buttons on the Reminders dialog to be truncated with some fonts.
- We fixed an issue that caused default SMIME labels to fail to apply when a user replies to or forwards an unlabeled message.
- We fixed an issue that caused users in hybrid environments to be unable to apply labels to emails.
- We fixed an issue that made it possible for a legacy WebView ItemSend add-in to bypass condition checks when switching items.
Current versions and build numbers
Based on your release channel, you’ll be updated to the following version;
- Microsoft 365 Apps, Outlook 2016 Retail, Outlook 2019 Retail, Outlook 2021 Retail, Outlook 2024 Retail
Version 2409 (Build 18025.20140) - Monthly Enterprise
Version 2408 (Build 17928.20216)
Version 2407 (Build 17830.20232) - Semi-Annual Enterprise (Preview)
Version 2408 (Build 17928.20216) - Semi-Annual Enterprise
Version 2402 (Build 17328.20612)
Version 2308 (Build 16731.20810) - Outlook LTSC 2024
Version 2408 (Build 17932.20130) - Outlook LTSC 2021
Version 2108 (Build 14332.20791) - Outlook 2019 Volume Licensed
Version 1808 (Build 10415.20025)
Note: Depending on your installation type, this update can be installed via the Update Now button in Outlook itself or the Microsoft Store. This update does not apply to msi-based installations of Office 2016.
