Microsoft recently announced plans to eventually stop the activation of Silverlight, Shockwave, and Flash content in Office 365. This is not just the developers disabling bugs with an option to click a link or button to look at content. Within a few months' time, Flash will be gone from Office 365 for good.
Office 365 will block Flash by 2019
Office 2019 and Office 365 no longer features OneNote

The Universal Windows Platform (UWP) version of OneNote will now be the only app available for Windows 10, as Office 365 and Microsoft Office 2019 will do away with the 32-bit desktop app.
Microsoft's OneNote desktop application is nearing the end of its journey, as the software giant will stop developing the product line past the 2016 edition.
How to optimize Office 365

Out of the hundreds of Office 365 tools available to you, you’re probably using only 10-15% of them. This could be due to a lack of training or an unfamiliarity with some of the advanced options available in Word and Excel. But it’s easy to optimize your Office 365 investment by learning more about the following communication and collaboration features.
Microsoft updates apps for Apple devices
Groups, Yammer, and Teams defined
New AI-driven Features For Office 365 Users

Enriching Office 365 with more everyday AI functionalities, Microsoft has introduced ‘Insights Preview’ to MS Excel, ‘Acronyms’ feature for MS Word, and a Text-in-image search feature to help its users to do their best work. Learn more about the recent upgrades to Office 365 products and the new Microsoft Whiteboard Preview app in this article.
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Microsoft Teams: The new Skype for Business?

Microsoft unveiled plenty of new developments and upgrades during last month’s Ignite conference, but one that shocked many users is what’s happening to Skype for Business. The tech giant confirmed that they are phasing out Skype for Business and going all in on their new collaboration platform, Microsoft Teams.