I have created a Lookup Relationship on the Account object to a custom object named Installation (API name Most_Recent_Installation__c).
I want to be able to show a field from this related object on the Account Page Layout and to do this created a custom formula field on the Account using the following formula:
Note the subdomain field is a Text(64) (Unique Case Insensitive) & is Indexed.
However no matter what I do I always get blank values displayed on the Account as well as when I query for this field using the Developer Console.
Any ideas what I'm doing wrong? I have created a formula field on the Installation object itself referencing this field and can see the values