Hi @Ramki ,
For me, based on my tests, only the external users will send the email when they RSVP accepted the meeting request.
While the internal users, who are inside your organization, they won't send the email but the request status will be automatically updated once they change to accept/declined.
But on Outlook, this is by default to send emails and as well, you could choose to Do not send response email option.
Please check if you are in the same situation:)
Best regards,
Lou
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