Hi @Kim
I am afraid there is no direct ways to disable notifications when you add a new participant to a calendar invite in Teams client. But you could prevent the notifications send to original invitees.
In Outlook, you may try the steps below to prevent sending updates to original invitees.
- Go to Outlook and open the scheduled Teams meeting. Then, add meeting participants.
- Click 'Send updates'. If asked if you want to send the meeting request without a location, (in case you don't have one) click Send anyway.
- Then, a prompt similar to the photo below should appear on the screen. Select 'Send updates only to added or deleted attendees' so original attendees won't receive the update and only the added ones will get the email.
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