Returned +notification information

The ReturnValue property returned by callback is an iterator containing the requested notification information +on calendar entry changes. Each item (object) in the iterator corresponds +to one change in the target calendar.

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**Table:** ReturnValue properties +for notification information
+ Property +	+ Description +	+ Type +	+ Value +
+ `<item>.ChangeType` +	+ Specifies the type of change made in the calendar. +	+ string +	+ Possible values: + + `"Add"` + `"Delete"` + `"Modify"` + `"Unknown"` + +
+ `<item>.LocalId` +	+ Specifies the `LocalId` of the calendar entry that +was created, deleted, or updated. +	+ string +