How to convert custom properties to array field

Hello, I need to exclude multiple disks.
I can’t exclude multiple disk with a separation comma.

So I would like to turn the disk_win_exclude field into a array - that way I can exclude multiple disks.

But how does that work on a service?

I have the custome field:

And here should be an array:

Thanks for any help in advance.

in /icingaweb2/director/datafield you can change the datafield to an array.
after that you can choose the icinga director repeat key option in the arguments section of the command or you manipulate the array to a string via icinga dsl, also in the argument section