2.2.82 [RFC5545] Section 3.8.4.7 Unique Identifier

V0169:

The specification states that non-standard property parameters can be specified on the UID ([MS-OXCICAL] section 2.1.3.1.1.20.26) 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 parameters on the UID property. Microsoft Exchange ignores all parameters on the UID property.

V0170:

The specification states that the UID property MUST be specified in VEVENT, VTODO, VJOURNAL, and VFREEBUSY components, and that calendaring and scheduling applications MUST generate this property in VEVENT, VTODO, and VJOURNAL components.

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

Microsoft Exchange exports exactly one UID property on VEVENT components. Microsoft Exchange does not export VTODO, VJOURNAL, or VFREEBUSY components.

On import, Microsoft Exchange ignores all instances of UID outside of VEVENT components. If multiple UID instances are found in a VEVENT, or if no UID property is found, Microsoft Exchange fails to import the iCalendar object.

V0171:

The specification states that the UID MUST be a globally unique identifier, and the generator of the identifier MUST guarantee that the identifier is unique.

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

On export, Microsoft Exchange generates unique values for UID. On import, Microsoft Exchange behavior is undefined if a non-unique UID value is imported.

V0172:

The specification states that it is recommended that the identifier's right-hand side contain some domain identifier.

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

On export, Microsoft Exchange exports any UID property that the calendar user agent sets.

On import, Microsoft Exchange can import any valid UID value.

V0173:

The specification states that though other algorithms will work, it is recommended that the right-hand side of the UID contain some domain identifier such that the generator can guarantee the left-hand side within the scope of that domain.

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

On export, Microsoft Exchange exports any UID property that the calendar user agent sets.

On import, Microsoft Exchange can import any valid UID.