This extension notifies you when new messages arrive in your Office mailbox.
Office 365 Notifier checks your Office online webmail account and notifies the number of unread messages.
When new message arrive in your mailbox, a system notification is posted.
You can view your next appointments (save in your Office online calendar) and be notified by the system.
To be notify, you must be connected to Office online web site in a tab of Chrome.