Outlook 2016 for Mac currently doesn't support the Cal DAV or Card DAV internet standards.
This means that it's not possible to synchronize your i Cloud Calendar or contacts with Outlook 2016 for Mac.
However, Outlook 2016 for Mac supports Apple i Cloud Mail.
The information you enter here will appear in your organization’s address book.
After you’ve finished updating your information, select Save to save your changes or Cancel to leave the account information without saving any changes.
The My account page includes a link to change your password.
It may be the case that your organization doesn’t allow you to change your password on this site.
If so, ask your admin for help changing your password.