Outlook events created with Booking with Me not showing in macOS Calendar app

Hi m_steuer,

Welcome to Apple Support Communities. We understand that you're having an issue with an event showing in your calendar on your Mac when it's scheduled through Outlook's Bookings with me. We'd like to help.

Sounds like this new feature worked well to get those events over to your iPhone and iPad. Did you have to change any settings in Outlook or on your iOS devices to get that done? Have you checked to see if this new feature is set up to share details to your macOS? Have you updated your macOS to rule out that being an issue?

Update macOS on Mac

Use Software Update to install updates and upgrades for macOS and its built-in apps, including Safari.

Use Software Update

Before following these steps, it's a good idea to back up your Mac.

1. From the Apple menu  in the corner of your screen, choose System Settings or System Preferences.

* If you chose System Settings, click General on the left side of the window. Then click Software Update on the right.

* If you chose System Preferences, click Software Update in the window.

2. Software Update then checks for new software. 

* If Software Update finds new software, click the button to install it. The button might be named Update Now, Upgrade Now, Install Now, or Restart Now, for example. You might then be asked to enter your administrator password.

* If Software Update says that your Mac is up to date, then no new software is currently available for your Mac model. Software Update shows only software that is compatible with your Mac.

You can get more info about updating macOS here: Update macOS on Mac - Apple Support

If you are updated to the most updating macOS, which is macOS 13.2, and the issue persists, it would be best to connect with Microsoft about this. They can confirm compatibility and possible additional troubleshooting steps to make sure things are set correctly.

Hope that helps.

Cheers!