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Send one newly added guest the current meeting invitation.
Your new guest gets the current meeting time and joining details by email, while you get a confirmation without emailing the other guests.
Update the right invitation and list guests included in the update.
Your meeting invitation carries revised joining details, and your colleague gets a reply showing which guests were included.
Replace old joining details and resend the meeting invitation.
Your meeting invitation has the latest joining details after you post them in team chat, and you see whether the calendar accepted the guest update.
Add video links to guest bookings and send updated invitations.
Guests get a way to join remotely when your calendar invites need one, without you making calls and resending updates by hand.