If you are using Microsoft Office 365 online services, you need to keep your Internet Explorer up to date. I highly recommend doing it to minimize risk of exposure. The cyber space is an open network, where everybody is using it for almost everything from email, shopping, chat, etc., and some malicious users lurking to find their next victim.
I received an notice from Microsoft 365 message center.
Beginning January 12, 2016, only the most recent version of Internet Explorer available for a supported operating system will receive technical support and security updates. We will work to update and clarify our Office 365 system requirements soon, and communicate this to you via Message Center.I hope this help minimize risk of vulnerabilities by keeping your system up to date. Share your thoughts.