A Rollup Update has been released for Outlook 2016. This is a non-security update which contains the following documented improvements and fixes.
- Fixes an issue that causes the SharePoint site option not to appear under Attach File > Browse Web Locations.
Note To fix this issue, you must install KB4484395 together with this update.
- Fixes an issue for Calendar Overlay users that causes Outlook to default to the last-added calendar instead of the primary calendar when they switch to the calendar module.
- Fixes an issue that causes users to be unable to turn off the Outlook Today functionality.
- Changes the default fallback encryption from 3DES to AES256. The default fallback encryption is chosen if the recipients’ certification doesn’t have Secure/Multipurpose Internet Mail Extensions (S/MIME) capabilities published to the certificate.
Note: This update can be installed via Microsoft Update and updates Outlook to version 16.0.5056.1000. This update does not apply to Perpetual and Microsoft 365 based installations of Office 2016.