Cvent is capable of sending DMARC compliant email because they support custom DKIM configurations that achieve DMARC alignment. Cvent is an Event and Hospitality Platform and is often used by Marketing and Corporate teams.
We recommend opening a support ticket to get help with custom DKIM configurations as we couldn’t find any relevant ‘how to’ documentation on their site. The most recent support alias we found was: https://www.cvent.com/en/contact/support