

Outlook 2010 users must have the latest Windows updates applied before carrying out this task. So, before you begin this procedure, please ensure Outlook is not running on your computer. You cannot manually configure a new Microsoft Exchange account with Outlook running.

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.).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”.We fixed an issue that was causing users to see multiple copies of a shared calendar rendered in certain circumstances.We fixed an issue that caused emails to get stuck in the outbox for some profiles with multiple Exchange accounts configured.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. It contains 11 security updates for OneNote (1), Visio (3) and Office (7). 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.
