Hello, hellomauro.
Thank you for using Apple Support Communities.
For your concern with Calendar invites, are you using the steps found in this article? Use Siri Suggestions in Calendar on Mac
- "Add the suggested event to another calendar, or remove it, by doing one of the following:
- Add it to your default calendar: Click Add to Calendar.
- Add it to another calendar using the event info window: Click the pop-up menu in the upper-right corner of the window, then choose a calendar.
- Add it to another calendar using the notifications list: Click and hold Add to Calendar, then choose a calendar.
- Remove it: Click Ignore.
You can control whether calendar invitations received in Mail are added to your calendar automatically. In the Mail app
on your Mac, choose Mail > Preferences, click General, then select or deselect the “Add invitations to Calendar automatically” checkbox."
If so, try seeing if you're able to do this under a new user account: Set up users, guests, and groups on Mac
Best regards.