2.2.53 [RFC5545] Section 3.8.1.2 Categories

V0087:

The specification states that non-standard and language property parameters can be specified on the CATEGORIES ([MS-OXCICAL] section 2.1.3.1.1.20.3) property.

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

Microsoft Exchange Server exports no non-standard or language property parameters on the CATEGORIES property, and ignores all parameters on the CATEGORIES property on import.

V0088:

The specification states that the CATEGORIES property can be specified within the VEVENT, VTODO, or VJOURNAL components.

Exchange 2007, Exchange 2010, Exchange 2013, Exchange 2016, Exchange 2019

Microsoft Exchange only exports the CATEGORIES property within VEVENT components. On import, CATEGORIES properties in any component other than a VEVENT component are ignored.

V0089:

The specification states that multiple categories can be specified as a list of categories separated by the COMMA character (US-ASCII decimal 44).

Exchange 2007, Exchange 2010, Exchange 2013, Exchange 2016, Exchange 2019

On export, Microsoft Exchange exports at most one CATEGORIES property per VEVENT component. The value of the CATEGORIES property can contain multiple categories, which are separated by commas.

On import, Microsoft Exchange can parse multiple instances of the CATEGORIES property on a single VEVENT component.