How to change the display name and mail address of a mailbox in Exchange

Connect to Exchange ECP
Edit:

• Display name
• Alias
• Email address

Connect in Active Directory

• Edit CN
  Connect directly to Exchange
  Open powershell and type the following command:
  set-user -identity indirizzomail@dominio.com -name new-email-address (only the part before the @)

  Es: set-user -identity pippo.pluto@dominio.com -name minni.paperino

The end result will be the transformation of the address pippo.pluto@dominio.com into minni.paperino@dominio.com