Exchange Connection for Custom Contact Forms

Hi,

When I use the PowerBI exchange data connector to connect to an exchange address book, it only pulls through the contacts that are saved with the standard contacts form (IPM.Contact) despite there also being other contacts with a custom form there too. Does anyone know how to access the data saved in Outlook Customer Forms. e.g. contact information saved in IPM.Contact.UserForm?

Also, it does anyone know have to access other fields in an address book such as "Modified (Date)"?

Thanks,

A