2.2.7 [RFC5545] Section 3.2.3 Calendar User Type

V0014:

The specification describes the optional CUTYPE parameter.

Microsoft Exchange Server 2007, Microsoft Exchange Server 2010, Microsoft Exchange Server 2013, Microsoft Exchange Server 2016, Microsoft Exchange Server 2019

On export, Microsoft Exchange Server only exports a CUTYPE parameter for the ATTENDEE ([MS-OXCICAL] section 2.1.3.1.1.20.2) property. If set, the only possible values are "RESOURCE" or "ROOM".

On import, Microsoft Exchange ignores the CUTYPE parameter on any properties other than ATTENDEE. Furthermore, values other than "RESOURCE" (case-insensitive) or "ROOM" (case-insensitive) are ignored.