I have a user who name is John Doe for example. And his email was email@example.com and he left the organization after a while and we had a new user who name was joseph Doe and we created the same email address firstname.lastname@example.org but when we try to give permission in sharepoint to joseph doe the name and profile changes the name showing John Doe instead of Joseph Doe. I tried to go to manage user profiles and look for the user to edit but i am unable to see john doe nor joseph doe. I tried creating new one and it says account exist. Not sure where to find. I am trying to find that using powershell to see if i can make the changes. Please help. This is becoming an issue a lot nowadays.