Why can't I modify the attendees of a meeting I created from Outlook in Microsoft Teams Free?

You can’t currently add or modify meeting attendees in Microsoft Teams Free. When you use your Microsoft account to log in to Microsoft Teams Free, you can view and modify the meeting details from that account’s Outlook calendar (except for the attendees).

To modify the attendees for an Outlook meeting, use your Microsoft account to sign in to Outlook.com, then use the calendar to edit the meeting and add or modify attendees.