For IT admins, version 16.17 was a "fork in the road." Office 2016 perpetual licenses were capped at 16.16.x. Moving to 16.17 required a new 2019 license.
If you are currently running this version, keep these dates and compatibility issues in mind: Update history for Office 2016 C2R and Office 2019 Microsoft Excel 2019 VL 16.17
New "roaming pencil case" features allowing for tilt and pressure sensitivity with digital pens or trackpads. 🔑 The Volume License (VL) Transition For IT admins, version 16