An overview & new features for the recent Office 365 v1905 release are documented in following links

https://redmondmag.com/articles/2019/06/03/office-365-version-1905-released.aspx

https://techcommunity.microsoft.com/t5/Office-International-Blog/Office-365-for-Windows-Desktop-May-2019-Release-details/ba-p/660534

Microsoft described some newly released Office 365 perks in recent days. The improvement included a new Windows desktop release, as well as improved Office 365 setup and branding capabilities. There’s free monitoring support to combat e-mail spoofing. Office 365 users will now see their personal and work accounts in one place within a new account manager, which lets them easily switch accounts. Microsoft also made it easier for Outlook users to “add Outlook.com and Gmail accounts that use 2-factor authentication,” per Microsoft’s Wednesday announcement.