Forum Discussion
change employee ID to email address format in exchange online
Dear Expert My business requirements is that users need to able to sign-in to Office 365 using UPN with email address format. Currently, their username is the <EmployeeID>@emailaddressDomain.com....
How about Azure AD Connect and Outlook configuration?
Hi Kumton,
First of all you have to change the UPN in your On-Premises AD, then do a sync.
After you change the UPN like Juan said, your users have to use new UPN format to login and to Outlook reconfigure the profile.
Note: After you change your UPN services like Skype for Business their login and SIP will change to the new one.