Dear PApps Experts,
Another blocker which I got.
I'm passing to the app via parameter named "Mailbox". It's my Item Form property:

This is my Items Property in ComboBox named MailboxChoice1:

When I'm passing the app with Parameter, my MailboxChoice1 field DisplayMode is "View", and the Choice is empty. How can I feed this field with "Param" value?

When I'm trying to get "Default" value of this field as Param("Mailbox") I'm getting an error "Expecting Record value":

Sum up: feed MailboxChoice1 with Param("Mailbox") as default.