How can I disable calendar reminders for invitations by shared mailboxes

Hi!

We use a shared mailbox for a calendar for events. Events are projects that are lead by several project managers. 

Some of them want to invite themselves to the events so they also see it in their own calendar. This automatically creates a reminder for that event in the personal calendar of the user. Even though if the have all auto reminders set to none.

Is there any way to disable this?