Microsoft Office 2016 for Mac version 16.12, released around April 2018, introduced several cross-suite enhancements and specific updates for Outlook.
: Starting with version 15.25, Office 2016 for Mac moved to a 64-bit default. Version 16.12 is part of the 16.x release cycle, which is strictly 64-bit. Microsoft Office 2016 for Mac 16.12
: The Microsoft AutoUpdate tool was updated to support the msupdate command-line tool, facilitating better management for advanced users. App-Specific Features Outlook : Microsoft Office 2016 for Mac version 16