Outlook 2016 / 2019 / 2021 / 365 Update for December 2022

The December 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 11 security updates for OneNote (1), Visio (3) and Office (7).

In addition, it contains 1 documented non-security fix related to Outlook Monthly Enterprise Version 2210, 4 fixes for Semi-Annual Preview Version 2208, and 2 fixes for Semi-Annual Version 2202.

  • Version 2210
    • We fixed an issue that caused emails to get stuck in the outbox for some profiles with multiple Exchange accounts configured.
  • Version 2208
    • We fixed an issue that was causing users to see multiple copies of a shared calendar rendered in certain circumstances.
    • Resolved an issue where Outlook would close unexpectedly when clicking on certain email messages with Word document attachments and the reading pane is set to “Right”.
  • Version 2208 and Version 2202
    • We defined a Registry key that when set fixes an issue that prevented messages from being sent when Outlook is running with multiple Exchange accounts and at least one of them is in Online mode (as opposed to cached mode.)
      • Key: HkCU\Software\Microsoft\Office\16.0\Outlook\RPC
      • Value Name: UseInclusiveGlobalOfflineCapabilities
      • Value type: REG_DWORD
      • Value (Default): 0
      • Value 1 = Adjusts the Global Offline Capabilities for profiles with Exchange accounts, so that they are less restrictively aggregated/computed.
    • We fixed an issue that caused users to see copies of all of their sent items appearing in their Outbox folder.

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 2211 (Build 15831.20208)
  • Monthly Enterprise
    Version 2210 (Build 15726.20262)
    Version 2209 (Build 15629.20298)
  • Semi-Annual Enterprise (Preview)
    Version 2208 (Build 15601.20378)
  • Semi-Annual Enterprise
    Version 2202 (Build 14931.20858)
    Version 2108 (Build 14326.21248) 
  • Outlook LTSC 2021
    Version 2108 (Build 14332.20435)
  • Outlook 2019 Volume Licensed
    Version 1808 (Build 10393.20026)

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.