I want to have the Exchange calendar set up to automatically enter my resource booking inquiries (not only conditionally).

• Open the Exchange calendar via Webmail (https://mail.tum.de)  with Internet Explorer.
• Click options (top right) and select "Ressourceneinstellungen".
• Then select "Automatisch Besprechungsanfragen und Absagen verarbeiten".
• Configure the resource planning rights if required and click "Speichern".

Important: This works only if you use Internet Explorer and only if it involves a resource (equipment or room), not a mailbox (private or shared).