Microsoft Graph
A Microsoft programmability model that exposes REST APIs and client libraries to access data on Microsoft 365 services.
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It seems that when I use the deltaToken with calendars, if any changes are outside the window, the returned events have all fields null. If I change the time window, I get a new deltaToken and it returns all events during that window, again.
Also, any events outside the window aren't return if we update the dates using the same deltaToken.
Ideally, the deltaToken if its meant to be used to detect changes wouldn't have an end date.