
1 answer

HiAs far as I know you can't directly do that.I was thinking about creating a external object mapped to your external data (ex: Account__x), relating Account__x with Account standard object through an external lookup, and creating formula fields in Account standard object referencing your Account__x fields, but formula fields don't support external objects by now, so, that's not possible either. Then I guess you will have to override account layout with a visualforce that shows the fields you need to see, those from your Account and those from its related Account__x.There is an idea for showing related objects fields in layouts, which you can vote (https://success.salesforce.com/ideaView?id=08730000000BrXVAA0).Regarding to reports, you can create reports that show related objects fields, so, that shouldn't be a problem.If I find out anything else I will write to you.Hope it helps, and best regards!