You want to enter the correct email address for that user as it will be used for validation once we move to single sign-on (SSO) in PLM 360. Do not use the same address for multiple users or leave the email address field blank as that can cause future logon issues. "SSO" refers to "Autodesk ID" or the single user name and password that's used across Autodesk properties. Not corporate SSO.
John Hill Support Specialist Product Support Autodesk, Inc.