InDesign CC Server 2014 and InDesign CC 2015 Application

Hi,

My corporate network has a windows server system with InDesign CC 2014 server software installed on it. My users however are now being pushed into the InDesign CC 2015 application. Would there be anyway possible to have InDesign CC 2014 server read and accept a InDesign CC 2015 package? Or... will my users need to downgrade back to InDesign CC 2014 Application? Thank you for your time.