There are quite a few announcements coming out of Build 2016 conference, including the addition of Office Add-ins in Office for Mac.
Office 365 Roadmap
The Office 365 Roadmap lists updates that are currently planned for subscribers.
How to Import Appointments into a Group Calendar
How to move or import appointments from an Outlook calendar into a Group Calendar.
Disable Conversation View in Outlook.com and Outlook on the Web
I love conversation view, most of the time. It makes it easier for me to follow message threads as all previous messages in the thread are together, regardless of which folder each message is stored in. Not everyone likes it and finding where to disable it isn't necessarily intuitive.
Microsoft FindTime: Meeting Poll
FindTime is now built into Microsoft 365 mailboxes. The Microsoft Garage released an Outlook add-in for Office 365 subscribers, called FindTime. This add-in lets recipients vote on the best time for a meeting. To use, create an email message and click New Meeting Poll. This will open a panel similar to the room finder, displaying
Calendar Insights Template for Excel 2016
A new feature for Office 365 email account is the Calendar Insights template for Excel. This is template creates a workbook connected to your Office 365 Exchange (or Outlook.com on the new server) calendar and analyses how much time you spend in meetings, the people you meet with the most, when your busiest time of the day is, and more.
Changing Outlook.com color schemes
How to change the colors used in Office 365 and (the new) Outlook.com's Outlook on the web.
Open Shared Mailboxes in Outlook on the Web
How to open shared Office 365 Exchange mailboxes in Outlook on the web (OWA).
Delete an Outlook Group
How to delete groups from either Outlook 2016 or Outlook on the web (formerly known as OWA).
Outlook 2007 with Office 365 and Outlook.com
Using Outlook 2007 to connect to Office 365 Exchange or the new Outlook.com.