I changed an old user danielle@.com to angela@.com under Manage Users. The email works. I can send and receive both on the web and outlook. But when I try to create an Alias/Proxy email address attached to another user michael@.com using the old danielle@.com I get an error message. The proxy address "smtp:danielle@.com" is already being used by "danielle". Please choose another proxy address.
I am trying to create the proxy email under manage my organization. I have done this before from a completely deleted email account.
I changed the user from danielle to angela so there is no danielle user anymore. What am I doing wrong?