Passing to app per parameter & choice box problem

[KarolCzer]

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.

[KarolCzer]

Kindly F5. @RandyHayes 

[v-bofeng-msft · Accepted solution]

Hi @KarolCzer ,

You could set the combo box's DefaultSelectedItems property to:

LookUp(
  'Suggestion Mailboxes',
  Title=Calsece(Param("Mailbox"),Title) &&
  Today()>= Valid_x0020_from &&
  Today()<=Vaild_x0020_to &&
  Enabled=true
)

Best Regards,

Bof