Make calendar entries visible depending on their status.

how do you determine 'available dates'?

I have set that when you select a date from the drop down, the status changes to Booked.

I want that the drop down list only shows the not booked dates.

create a view on the list that show only not booked items.

configure the view name into 'Source view' lookup control configuration option.

The problem is that when I work with a list lookup I always get an error message.

• I'll try to explain it better.
• I have set a look up field on a calendar in the form for the appointment selection, so that in a drop down all appointments I have created in the calendar are displayed.
• In addition, I have specified that each appointment can only be assigned once, as you can see from the error message.
• How do I get it that only those appointments are displayed in the drop down that have not already been booked? 

have you seen my previous post, I think it satisfies your requirements.

or doesn't it suit you for any reasons?

Thank you for the information that works. :smileyhappy:

In a second step, how can I arrange that the selected date from the drop down will change after saving the form the calendar appointment automatically to booked?

create a workflow that strart on item create and that updates respective entry in calendar list

I tried it, but it always updates the first item and not the selected date.

where condition should identify the calendar item that you previously selected on the form. it has to identify just SINGLE calendar item, preferrably by item ID, not all the items with status 'Frei'

Can you please explain to me what you mean?
How would you implement that?

Kind Regards,

Florian 

on the current item, the workflow is running on, you've populated/selected a lookup field from calendar list.

so you have to take that field's value and search for matching item in calendar list. the best/most reliable would be to search by item ID, but nintex by default search for match by 'value' field. in my example bellow I used Title field. if you used a different field you'll need to customize it accordingly.

so the update action might look like