Here is a script used in the past to change the cn attribute (the RDN) of users. The code you use depends on how you want to rename the users. This example retrieves first and last names (if assigned) and renames the users based on those values.
# Find all users in the search base that have a first (GivenName) and last name (Surname) assigned in AD.
# The new Relative Distinguished Name (RDN) will be "Firstname Lastname".
$Users = Get-ADUser -SearchBase "ou=Sales,ou=West,dc=Domain,dc=com" -Filter {(GivenName -Like "*") -And (Surname -Like "*")} | Select GivenName, Surname, Name, DistinguishedName
# Enumerate the users.
ForEach ($User In $Users)
{
# Retrieve values for the user.
$DN = $User.DistinguishedName
$First = $User.GivenName
$Last = $User.Surname
$CN = $User.Name
$NewName = "$First $Last"
# Only rename the user if necessary.
If ($CN -ne $NewName) {Rename-ADObject -Identity $DN -NewName $NewName}
}
Another example renames the users based on values in a CSV file.
# The CSV file has a header line defining the fields sAMAccountName and RDN.
# sAMAccountName specifies the user, RDN is the new value of the cn attribute.
$Users = Import-Csv c:\scripts\users.csv
ForEach ($User In $Users)
{
# Retrieve values from the CSV for this user.
$ID = $($User.sAMAccountName)
$NewName = $($User.RDN)
# Find the existing value of the cn attribute and the distinguishedName of this user.
$ADUser Get-ADUser -Identity $ID | Select DistinguishedName, Name
$CN = $ADUser.Name
$DN = $ADUser.DistinguishedName
# Only rename the user if necessary.
If ($CN -ne $NewName) {Rename-ADObject -Identity $DN -NewName $NewName}
}
Richard Mueller - MVP Enterprise Mobility (Identity and Access)
