I would like to create a custom list in SP2013 that would have two
People or Group columns. One would display the Name of a user, the other would display his email address of the same user (both information are available in this column type - I assume they are taken somewhere from MySite).
Is there any way how to make the content of the other column display automatically? i.e, When I select User A in the first column, I wouldn't have to manually add his email address to the second column but it would fill automatically?