Collaborate and communicate with your team members directly from within Outlook. This add-in works with: Outlook 2013 or later, Outlook 2016 for Mac, Outlook on the Web.
You could install the Add-in here.
The following steps can be followed:
1) Click on the Add button
2) Sign-in to your Microsoft OutLook/Office Account:
3) Click Install
4) Click OK
The Add-in will have now installed.