Organizing and accessing contact information in Outlook.com
Many thanks for posting the solution.
Here is just an update as some bits have been moved/renamed/changed by Microsoft...
- Login to outlook.live.com
- In the browser, click on Settings icon (gear at top right) > scroll down the Quick Settings panel and click on 'View all Outlook settings'
- In the pop-up window, select 'General' > 'Mobile Devices'
- Select the iPhone, note if you have more than one iPhone (e.g. an older device), select the 'Edit' icon (pencil) to check the details including the version, 'OK' to exit details
- Click on the 'Delete' icon (bin) to remove the device
- Power off the iPhone
- Power on the iPhone - device should attempt to re-register with Microsoft
- Open the iPhone Mail app and look for email with subject: "ACTION REQUIRED TO SYNC EMAIL" (note, this email won't appear in the online version of Outlook, only in the iPhone Mail app)
- Scroll down the message and click on: "Continue using this email app".
> Passwords & Accounts. Tap Exchange, sign in to your Outlook.com account, then turn on Contacts.