I'm using Google Calendar Sync to keep my Outlook calendar and Google calendar synchronized and I've noticed a couple of meetings that don't quite get synchronized right - the error message being "Participant is neither attendee nor organizer." (Yes, there are two spaces between "attendee" and "nor.").
I haven't figured out what the problem there is but I did find this interesting nugget to help you troubleshoot issues:
- Go to your Google Calendar log folder. On WinXP that'll be like C:\Documents and Settings\YOURUSERNAME\Local Settings\Application Data\Google\Google Calendar Sync\logs
- Put a text file in there called "level.txt" and put one word in it: VERBOSE
- Run a sync from Google Calendar Sync. The log will come out a lot larger and will have a ton more logging information in it.
- Delete the "level.txt" file. You don't want verbose logging all the time.
Interestingly, for me the appointments that won't sync are all meetings that my boss organized. Is Google Calendar trying to tell me something? :)
UPDATE 5/27/10: I switched to gSyncit to sync my calendar.