Military Family Leave Act of 2017 This bill entitles an employed family member of a member of the Armed Forces who receives notification of a call or order to active duty in support of a contingency operation, or who is deployed in connection with a contingency operation, to two workweeks of leave per year for each family member who is so called or deployed. Such leave may: (1) be taken intermittently or on a reduced leave schedule; and (2) consist of paid or unpaid leave, as the employer considers appropriate. The bill: (1) allows an employer to require certification of entitlement to such leave within a leave request, (2) provides employment and benefits protection for employees upon their return from such leave, and (3) prohibits an employer from interfering with or otherwise denying the exercise of such leave rights.