Outlook.com Application not syncing Calendar

[mwatson1445]

I am running Windows 10 with Outlook.com. I have loaded the outlook app on my iPhone. I have added my account and chose to have my calendar sync. I am able to see the email on my Outlook App but when I select the calendar it says "No connected Calendars" "None of your accounts have a calendar attached" How do I attache a calendar? Thanks for the help!!!