Main bookings calendar not showing busy blocks from outlook

It looks like what you’re seeing isn’t a setting you can switch back on, but rather a change in how Microsoft Bookings now works. In the newer version, Outlook appointments still sync to Bookings, but they no longer appear as busy blocks on the main calendar view; instead, they only show up in each staff member’s availability panel. This means the main calendar won’t automatically warn you of double bookings the way it used to. The only real workarounds right now are to check availability in Outlook or Teams before adding an appointment, or to open the staff availability screen inside Bookings. I know it’s less convenient, but at the moment Microsoft hasn’t given us a way to bring those busy blocks back into the main view.

------------------------------------
Don't forget to mark as solution if my answer suits you