Hi, I have a Calendar called "ConferenceRoomUsageCalendar" where people add when they want to reserve our conference room.

Therefore I created an Calendar category called "ConferenceRoomUsageCategory".

Now I want if a user creates an event in the front end from the monthly view by clicking the "+" icon that if he selects the Events Calendar "ConferenceRoomUsageCalendar" that in "Categories" only "ConferenceRoomUsageCategory" is possible to choose and already selected.

Right now all of my Categories are possible to be chosen.