Microsoft released a special toolbar for Office365 for macOS. This is to enable faster access to documents, calendar data and much more. My Workspace is the program that was developed in Microsoft Garage and is freely available for download. Similar to Dropbox or OneNote, there is also an overview of current files and especially important ones can be pinned directly. For all Mac users who work regularly with Office 365 is a helpful affair. More in the video below. Behind the source link you will find the download.