Hello Julián José López Arellano,
Thank you for reaching out to Microsoft Support!
In response to your question, many users have asked similar questions, but unfortunately there is currently no way to prevent emails from being sent to attendees when an event is created, which is a default behavior when an event is created.
You can also refer to the case of other users:
Graph API documentation:
https://learn.microsoft.com/en-us/graph/api/user-post-events?view=graph-rest-1.0&tabs=http
Hope this helps.
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