Cisco Spark brings teams together instantly in rooms where you can send messages, video chat, and share files, all in one place.
Many organizations, including mine, use this application on a daily basis.
IFTTT has integration for it (https://ifttt.com/cisco_spark), and it is very usefull. The limitations of Office365 Mail on IFTTT make the creation of Applets limited, something that could be overcome with a connector for CiscoSpark on Microsoft Flow!