Setting up your Contacts on your phone is quite similar to setting up your emails and accounts. Basically, you're synchronizing your phone with your internet account that manages your contacts so they'll be downloaded and ready to use. To set up your Contacts, follow these instructions...

1. On your iPhone 7, open the Settings app.
2. Select Contacts.
3. Then tap Accounts, and then Add Account.
4. Select Outlook.com from the drop-down menu.
5. Sign in with your Outlook.com login and password.
6. Allow Outlook to access your data by tapping Yes.
7. Toggle on the switch next to each service you want to use. If your iPhone already has calendars, mail, or contacts, you'll be asked if you want to keep them or erase them. Tap the option you want.
8. Tap on Save in the upper right-hand corner.