Download Outlook for iOS from the iOS App Store?and then open it. The icon looks like this: 

Note:?See system requirements for your iOS devices?here. 
  
If it’s your first time using Outlook for iOS, enter your full email address, then tap?Add Account. 

If not, open the?Menu?> tap?Settings??>?Add Account?>?Add Email Account. 

 
Enter your email account password and tap?Sign In. 

Note:?The sign in screen may look different for you depending on your email provider. 

 
 
If multi-factor authentication is enabled, Accept any prompts for permission you may receive. 

Enabling Contact Syncing  

1. Open Outlook for Mobile App and?Select the “Photo” icon.? 
    
    
   ? 

2. Select the “Gear” icon. 
    
    
   ? 

3. Under “Mail Accounts” select “Office 365” with your? email address below it. 
    
    
   ? 

4. Switch toggle?on for “Save Contacts”. 
    
    
   ?