Choose your account profile at the top right corner of the page > My Profile:
Choose Calendar Sync on the left side of your profile page:
From the Calendar Sync page, choose the Office 365 With Teams (BETA*) logo. You will be taken to a page to login to your Office 365 account.
After logging in, you’ll automatically return to your TimeTap account page, and the sync will begin. The first sync typically takes about 30 minutes to complete. After the initial sync, the calendars will update automatically every 15-20 minutes.