Great! System fields will be the same, but without the DE: piece. For example, in a user report, you might have: CONCAT({DE:Extension},"@email.com") And in an issue report, you might have: CONCAT({owner}.{DE:Extension},"@email.com") If "Extension" is a custom field on the user. And if you want to pull in a native field like "Last Name", here's how that would look: CONCAT({owner}.{lastName},"@email.com")