Outlook 2016 / 2019 / 365 Update for April 2021

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

It contains 6 security updates for Excel (3), Outlook (1), Word (1) and Office (1).

The details about the Outlook vulnerability;

CVE-2021-28452: Microsoft Outlook Memory Corruption Vulnerability.

  • This vulnerability is currently not publicly disclosed nor exploited.
  • The Preview Pane is not an attack vector.
  • The Exploitability Assessment is rated: Exploitation Less Likely.

In addition, it contains 3 documented non-security fixes for Outlook Current Version 2103, 4 new features and 8 fixes for Monthly Enterprise Version 2102, and 3 fixes for Semi-Annual (Preview) Version 2102 and 2 fixes for Semi-Annual Version 2008. Most notable fixes are;

  • Version 2103
    We fixed an issue that cause users to erroneously see a “This may take a while” message when adding a calendar.
  • Version 2103
    We fixed an issue that caused delegates to appear as the organizer of meetings created on newly added calendars. Meetings in this state did not appear on the principal’s calendar.
  • Version 2102
    We fixed an issue that caused Outlook to crash when idle.
  • Version 2102
    We fixed an issue that caused users to see more signatures than expected.
  • Version 2008
    We fixed an issue that caused users that have Shared or Delegated Mailboxes with large hierarchies in their profile to encounter hangs.

New features in Monthly Enterprise Version 2102 are;

  • Focused Inbox settings remain the same across devices
    Your Focused Inbox preferences are now stored in the cloud. Enjoy the same experience when you use Outlook for Windows on any computer and Outlook on the web.
  • Your Outlook settings in the cloud
    Choose your Outlook for Windows settings like Automatic Replies, Focused Inbox, and Privacy, and get to them on any PC.
  • Pick where to search
    The new search scope drop down allows you to more easily modify your search and switch between Current Folder and Current Mailbox. Thank you to everyone in Coming Soon who provided feedback on the new Search at Top experience. This design and update came out of that feedback!
  • Draft messages with your voice
    Use the new dictation toolbar, voice commands, auto-punctuation, and more to compose messages.

Based on your release channel, you’ll be updated to the following version;

  • Microsoft 365 Apps, Outlook 2016 Retail, Outlook 2019 Retail
    Version 2103 (Build 13901.20400)
  • Monthly Enterprise
    Version 2102 (Build 13801.20506)
    Version 2101 (Build 13628.20664)
  • Semi-Annual Enterprise (Preview)
    Version 2102 (Build 13801.20506)
  • Semi-Annual Enterprise
    Version 2008 (Build 13127.21506)
    Version 2002 (Build 12527.21814) 
  • Outlook 2019 Volume License
    Version 1808 (Build 10373.20050)

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.