Outlook 365 / 2021 / 2019 / 2016 Update for March 2024

The March security and rollup update has been made available for all Click-to-Run installations of Outlook 2016, Outlook 2019, Outlook 2021 and Outlook as part of a Microsoft 365 subscription.

It contains 1 security update for Shared Office Components.

In addition, it contains 2 non-security fix related to Outlook Current Channel Version 2402, 1 fix related to Outlook Monthly Enterprise Version 2401, and 1 fix related to Outlook Semi-Annual Version 2308.

  • Version 2402
  • Version 2401
    • We fixed an issue where meetings spanning a full day were appearing in meeting details on the following day. (OneNote)
  • Version 2308
    • We fixed an issue that caused Mail Tips to not appear for attachments.

Version 2402 has now also been released to the Semi-Annual Enterprise Channel (Preview) and contains 1 highlighted new features and over 31 fixes related to Outlook, which have been made available already to the Current release channel too. The new feature is;

  • Sensitivity Label scoping between files, emails and meetings
    Office applications can now filter out sensitivity labels based on the document type. For example, Outlook email will no longer show labels that only apply to Word, Excel, and PowerPoint documents.

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
    Version 2402 (Build 17328.20184)
  • Monthly Enterprise
    Version 2401 (Build 17231.20290)
    Version 2312 (Build 17126.20216)
  • Semi-Annual Enterprise (Preview)
    Version 2402 (Build 17328.20184)
  • Semi-Annual Enterprise
    Version 2308 (Build 16731.20600)
    Version 2302 (Build 16130.20928) 
  • Outlook LTSC 2021
    Version 2108 (Build 14332.20651)
  • Outlook 2019 Volume Licensed
    Version 1808 (Build 10408.20002)

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.