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I have a Google Calendar that's shared with about 20 people who have read/write access. Now, the past events started disappearing shortly after they happen. None of us are doing this on purpose; we want to keep the old events.

Based on what I read online, it seems likely that one of us has syncing enabled for this calendar, and that's screwing up the events. But how can I find out who? Is there a way to stamp out this problem other than by disabling write access from all users?

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1 Answer

  • Is someone syncing this calendar with an Exchange server or auto-exporting calendar events to a non G-Cal program that wants to move rather than copy the sync'd events?
  • Does anyone have an IFTTT (if this then that) rule that processes new calendar events?
  • Create one test event per person in this group, share it with just that person, and see which of the 20 events disappears shortly after creation. That'll discover which of these people have the problem-causing software. Then you can ask them what calendar tools they're using.

Addition: From the comment, so you're not adding any guests to these events, just putting them on a shared calendar?

In that case, do a different experiment. Temporarily remove half the people from the shared calendar, add an event, and see if it disappears. The first test will narrow it to 10 out of 20. If the event disappears, focus on that 10. If it doesn't focus on the other 10. The second test will narrow it to 5 out of 10. Then 2 or 3 out of 5, and so on.

Assuming only one account is causing the problem, you'll know which one in 4 or 5 trials.

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Can you explain how to "Create one test event per person in this group and share it with just that person"? It sounds like exactly what I need to identify the offender. But in the shared calendar, everyone sees everything. –  krubo Mar 27 at 1:42
    
Ah. If you're not inviting any guests to these events, just putting them on a shared calendar, then it takes a different experiment. I added instructions for that. –  Jerry101 Mar 27 at 5:47
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