2.2.61 [RFC5545] Section 3.8.1.8, Percent Complete
V0106:
The specification describes the PERCENT-COMPLETE property.
Microsoft Office Outlook 2007, Microsoft Outlook 2010, Microsoft Outlook 2013, Microsoft Outlook 2016, Microsoft Outlook 2019
Outlook does not implement the PERCENT-COMPLETE property. Outlook does not export or import the PERCENT-COMPLETE property.