Hi, Maria. Thank you for coming to the forum. My name is Femi. It is worth noting that this is a user community, and we are all users here, much like yourself. While we strive to assist and share insights, we are not Microsoft directly.
in my experience, this is caused by the Channel Calendar app automatically adding the Team’s email address to the required attendee's field when creating a new event. A possible workaround is to remove the Team’s email address manually before sending the invite.
To learn more; https://answers.microsoft.com/en-us/msteams/forum/all/turning-off-microsoft-teams-channel-calendar/cab6bae9-7ef7-4335-b379-b2c3ec415c2a
I hope this helps, let me know if this contradicts what you need. I remain helpful in answering any more of your questions.
Best Regards,
Femi.
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