Applies to: All version of Centrify Identity Service, App Edition
When provision AD users into Office 365, even if the user proxyAddresses attribute in AD is empty, the Office 365 account will always shows the user’s UPN as one of its Email Aliases.
This is an expected behavior for Office 365. As it will automatically having the smtp value of the user’s UPN as the Email Aliases.
Even if the proxyAddresses attribute in AD is empty, after the user provisioned to Office 365, the UPN of the user will appear on the Email Aliases field.
Please contact Microsoft for further assistance if the mentioned behavior above is not desired.