Before starting please read the "Baseline requirements Intune Project" this document will give you a inside view on what the Intune will do when deployed and what the requirement
BEFORE YOU START CREATE A BACKUP FROM THE USER FOLDER!!!!!!!!!!!!!!
Start>> settings>> Accounts>>> Access work or school
Click on the account and Click on the disconnect button, like the screenshot below.
Click on the Yes button.
Then your account is removed now click on connect again
Click then on the following button “Join this device to Azure Active directory”
Fill in the login information and follow the guide when the configuration is done reboot the machine.
If the machine is booted up again, Select in the login screen other user and login with your office 365 info.
When you are logged in follow the instructions on the screen.
After this the device is now Intune joined you can restore the user files.
Note: it could take a moment for everything is installed and configured.