I had trouble with Google Calendar Sync (GCS) deleting some of my Outlook calendar items when I set it up for 2-way synch between Outlook and Google. Then I dialed it back to 1-way sync, and found that some Outlook items weren’t getting copied to Google. Bummer.

I looked in “C:\Documents and Settings\kk4056\local settings\application data\google\Google Calendar Sync\logs” and found the error message:

Participant is neither attendee nor organizer