Contact us Unions & Activities 1050 S. Knoles Drive PO Box: 5670 Flagstaff, AZ 86011 University Union Tab Open Du Bois South Union Tab Closed University Union Accordion Open Email: Info.Desk@nau.edu Phone: 928-523-4636 Lost and Found: unionlostandfound@nau.edu Du Bois South Union Accordion Closed Email: Info.Desk@nau.edu Phone: 928-523-1594 Lost and Found: dublostandfound@nau.edu