Kim,
Have you tried potentially using the invitation email? I don't think that has a limit--but honestly, I am surprised that there is a limit on the save the date email because that would go to the same list that would receive the invitation. Have you confirmed that the system doesn't just send out in batches of 100? I know that Cvent likes to know when emails are being sent to a large number of attendees to help process more efficiently.
The Ideas section is now under "Participate" > Product Ideas.
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Lindsay Buchanan
OpEx Technology Administrator
Gilead Sciences, Inc.United States
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