2.2.52 [RFC5545] Section 3.7.3, Product Identifier

V0081:

The specification states that non-standard property parameters can be specified on the PRODID property.

Microsoft Office Outlook 2007, Microsoft Outlook 2010, Microsoft Outlook 2013, Microsoft Outlook 2016, Microsoft Outlook 2019

Outlook does not export non-standard property parameters on the PRODID property, and ignores all parameters on the PRODID property on import.

V0082:

The specification states that the PRODID property MUST be specified once in an iCalendar object.

Office Outlook 2007, Outlook 2010, Outlook 2013, Outlook 2016, Outlook 2019

On import, Outlook can import iCalendar objects missing a PRODID property. If multiple PRODID properties are found, then the PRODID properties beyond the first are ignored.

V0083:

The specification states that the vendor of an implementation SHOULD assure that this is a globally unique identifier.

Office Outlook 2007, Outlook 2010, Outlook 2013, Outlook 2016, Outlook 2019

On export, Outlook sets this to "-//Microsoft Corporation//Outlook 12.0 MIMEDIR//EN".

On import, Outlook can parse the iCalendar object incorrectly if the PRODID incorrectly imitates the PRODID of an earlier version of Outlook. For more details, see [MS-OXCICAL] section 2.1.3.2.4.

V0084:

The specification states that the PRODID property SHOULD not be used to alter the interpretation of an iCalendar object beyond the semantics, as specified in [RFC5545].

Office Outlook 2007, Outlook 2010, Outlook 2013, Outlook 2016, Outlook 2019

Outlook alters its interpretation of an iCalendar object based on this property. For more details, see [MS-OXCICAL] section 2.1.3.2.4.