Promt for show a users calendar entries in Outlook

Hi, I'm having som issues with a simple promt:

"Give me entries in user A Outlook calendar for Date xxxx.xx.xx"

The time periode could be of a week or a month even, but I've started to test with a specific day.

This seems to give me some of the meetings in the users calendar, but not all.
i.e. it's able list up teams meetings we are both attending, but not entries he've added himself that are only his.

I can see them in the calendar, he have also shared his calendar with me to see if it helps seeing the details, but no change.

This is a baseline for a prompt I'm planning to user later to suggest meetings based on users calender availability.

Anyone having experience with this?