We have a user that is leaving the company, we'll call her Clerk. She has her normal email address (jdoe@domain.com), but she also uses a proxy address or alias (clerk@domain.com). The new user taking her place will have the same setup, her normal first intial, last name email account, but I also need her to use the clerk@domain.com proxy address. When I try to move it from one user to the other, it says that it is already being used by the original user.
Is there a way to move the alias to the new user without deleting the old user's account, which the new user will still need to access from time to time?