Go to Settings, and then Accounts & Passwords.

Configure new office 365 account (if it isn't setup already)on your iPhone.

Setup email sync with your office 365 account through the iOS app If save contacts is enabled, disable it by clicking the slider

Then click on the Settings at the bottom left.

From main page, click on the three lines in the upper left-hand corner.

Open the Outlook app and change the contact sync to off (if it is not already off).

Make sure Outlook contact syncing is not enabled

To work around this, we can setup the Apple phone to get the contacts directly from Office 365, rather than trying to get them through the Outlook App. This is a one-way copy and makes it so that you can't change a contact from your phone and expect it to show up in your Outlook App (of your Office 365 account). They way Microsoft gets around this is to setup a process where it copies the contacts from Outlook App to the phone's contacts every so often. The problem with getting your Office 365 contacts on an iPhone, while using the Outlook app, is this: Apple doesn't allow third party apps (in this case Microsoft Outlook) to write directly to the phone's contacts. Office 365 contacts on an iPhone - what's the trouble? In this post, one of our IT Support Engineers, Tom Farr, solves the common complaint of having trouble getting your Office 365 contacts on your iPhone. It's this commitment to the user experience that has helped make us a Microsoft Office 365 Partner of the Year, multiple years running. At PTG, we enjoy being able to solve user problems with Office 365.

How to sync office 365 with phone