Hello,
thank you for the answer. Yes I'm using an account created by my university. For the version, since they are all called "Outlook", I'm not sure (it's not the one called "Outlook (classic)".
Here is the view of the calendar. If I want to open the agenda pane, it's now on the tiny button on the bottom right. If I click on it, the agenda pane appears over the calendar, not side-to-side, and disappears if we click outside it
So, how to put it back like before? Like on this screenshot I found on internet:
Thanks in advance
Siméon