connector creation

Question

Good morning, an outlook integration is being attempted, for which application permissions have been given to the calendar API from the Azure application registration platform. However, after creating the token and being used to create a calendar event it shows the following error:

{
"error": {
"code": "ErrorAccessDenied",
"message": "Access is denied. Check credentials and try again."
}
}

I look forward to your responses, thank you.