pull custom field data into a custom form with a typeahead field

[JennySt5]

Hi, hopefully this hasn't been answered recently, I searched but only found old questions that seem out of date.

I have a custom form that I am using a typeahead field to pull up some user information.

In my calculated fields, it seems to work perfectly if the field is native to workfront, but it says it is an invalid expression for custom fields.

So 

{DE:IC Name}.{phoneNumber}

displays a phone number

but 

{DE:IC Name}.{DE:Employee ID}

comes back as an invalid expression.

Any idea how I can display these custom user fields?

[Sven-iX · Accepted solution]

Sadly last i checked custom fields on typeahead objects are not supported - only native fields. 

[JennySt5]

That is so odd. I guess I will try to send the typeahead field data to another field first like someone else suggested to see if that works.