Change User Account
Use this dialog box to view or change the Exchange Administrator account information that was set during installation.
Exchange Administrator Account
Displays the Exchange Administrator Account for the site in which this Exchange Server resides. Use this space to modify the account if it has changed and now differs from the one displayed here or if the account was incorrectly entered during installation.
Use this space to specify or modify the Administrator Account password.
Use this space to retype the password for confirmation.