All ARE Windows systems have been upgraded to the newer Office 365 version (16.0.15128.20178). All Mac OS systems are upgraded through the app store and should automatically receive the latest version of O365 apps.
Most users will see new cosmetic/functional changes going from the version we were on (which was a few years old) to the newer version. If you would like to manually initiate the upgrade process, you can do so in Software Center. Otherwise, Office 365 will upgrade on its own.
If you have any questions or issues, please contact ARE IT.