I am trying to fetch an additional lookup column. From List A I have a field which is looked up in list B, and I have added an additional column from list A. How to fetch from the additional column using the REST API?
/_api/web/lists/getbytitle('ListB')/items?$select=Title,ListA/ProjectName,ListA/OM&$expand=ListA
I am getting "invialid column OM".

