2.2.96 [RFC5545] Section 3.8.8.3 Request Status
V0220:
The specification describes the REQUEST-STATUS property.
Microsoft Office Outlook 2007, Microsoft Outlook 2010, Microsoft Outlook 2013, Microsoft Outlook 2016, Microsoft Outlook 2019
Outlook does not implement the REQUEST-STATUS property. Outlook does not import or export the REQUEST-STATUS property.