When an event has more than 200 guests Google Calendar will correctly record guest RSVP statuses, but it won't propagate the status updates to the guest invites on the calendar event hold.

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There's no need to worry, as the guest RSVP statuses are recorded correctly within Epoch and will not cause any issues when guests RSVP into the events via Google Calendar.

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For example, when the guest list for the event Global All Hands exceeds 200 and John Smith confirms as going to the event via Google Calendar, he has a RSVP status of "Going" on the Epoch event insights page, even if his status on the calendar event does not reflect this.