If you rename the administrator account using MMC, only AD-specific attributes like sAMAccountName are modified. You may be required to update the uniqueID attribute if you want to use the renamed administrator account for iManager administration. For more information, see Section 25.1.31, iManager Fails to Create Samba Shares if the Administrator Name is Changed using MMC.
NOTE:You must not use special characters such as $ ` ! ' while renaming a domain administrator, because if the domain administrator name contains any of these special characters, any ADC or child domain installations to the domain will not succeed.
On a Windows workstation, click Start > Run, and enter mmc.
When the Console opens, select File > Add/Remove Snap-ins.
Select Active Directory Users and Computers and click Users.
In the details pane, right-click the user account that you want to rename, and then click Rename.
Type the new full name of the user account, then press ENTER to display the Rename User dialog box.
Fill in the following fields:
First name: Specify the first name of the user.
Last name: Specify the last name of the user.
Display name: Specify the user name to be displayed in Active Directory.
User logon name: Specify the user logon name and select the user principal name (UPN) suffix in the drop-down list. This field represents the userPrincipleName attribute.
User logon name (pre-Windows 2000): Specify a name for the user that is unique to the Active Directory forest. This field represents the sAMAccountName attribute.
Click OK.