In Exchange 2003, recurring events produce the same UID for each instance of the event. Even though each instance's start time is different, the UID is still the same. Therefore, it is impossible to uniquely identify a calendar item using only the UID. An example of the UID is: 040000008200E00074C5B7101A82E0080000000000C87FBB1756C9010000000000000000 100000005DC8DACAED81684E92730F6ED8C598BD I created a sample, recurring event and this is the data that is returned from Exchange, via CFEXCHANGECALENDAR: UID: 040000008200<snip>6ED8C598BD - STARTTIME: 2008-12-05 12:00:00.000 UID: 040000008200<snip>6ED8C598BD - STARTTIME: 2008-12-12 12:00:00.000 UID: 040000008200<snip>6ED8C598BD - STARTTIME: 2008-12-19 12:00:00.000 Given this example, how would I refer to the item on 2008-12-12? >From my testing, the natural key would be a combination of UID + STARTTIME. Has anyone else run into this issue? If so, what did you do to workaround it? Thanks Mike
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