Login problems with AD useraccounts when the username contains special characters

Please see the Microsoft link below:
http://support.microsoft.com/kb/938447

The diacritic mark is not supported for user names (AD should have just change the diacritic to the normal letter), however you may try to have the user sign in without it:
e.g
stéinr  could probably login as steinr

Maybe i have a solution.

Go to powershell with AD module write this command:

Get-ADUser -filter * -Searchbase 'OU=your1500users,DC=contoso,DC=com' | ? {$_.sAMAccountname -cmatch'[é ü ]'}  | Select sAMaccountname | Export-csv -path C:\username.csv -NTI

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Then go to your csv, copy the column A ( ctrl+c ,on excel). Replace every é by e, ü by u (CTRL+F -> replace -> search é and replace with E...) on the column A . Rename A1 by samaccountname1.
Then paste the original A column on B. Save your CSV.

Then execute this powershell script:

Import-Csv C:\username.csv | foreach {
$samoriginal = $($_.samaccountname)
$samnew = $($_.samaccountname1)
$samnew1 = $samnew + "1"
Set-ADUser -identity $samoriginal -samaccountname $samnew1 -UserPrincipalName "$($samnew1)@contoso.com"
Set-ADUser -identity $samoriginal -samaccountname $samnew -UserPrincipalName "$($samnew)@contoso.com"
}

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This code will change the sam account name and UPN.
I don't know if it works. If an expert understood what i mean, can you correct me?