Using Hubspot form submissions add registrants to 365 Calendar Event without deleting current registrants

What are you trying to achieve?

I’m trying to build a scenario that lets a customer submit a form in HubSpot, then adds that person to an existing Outlook event without removing the current attendees. Also, I want to ensure that only the new registrant receives a new invite.

Steps taken so far

I’ve tested it with Google calendar and it works fine. However, having issue adapting it for 365 calendar even when using an iterator and JSON.