Hello!
Someone recently left our company, and I need to give a new hire that person's old phone.  I have created a new user, extension, and mailbox for that person.  I just need to figure out how to point the phone from the old extension to the new one.  I promise I tried searching first!  I just don't know the exact phrase I'm searching for (extension swap, phone extension programming, etc.).  Any help would be appreciated, including if I need to set up more than just the user, ext, and mailbox for the new person!
Thanks!