Need to Replace non english characters with english alphabets

Hi Satish_krishna91 

Give the following a try.

It should be easy to modify with the rest of the characters you require to replace.

I have written it on the fly so the syntax may not be quite correct.

Make sure you run this on a small subset of users or better still some test users before running in production.

# Filter this down to a small set to test with before running over all users in domain.
$ADUsers = Get-ADUsers -filter *

foreach ($ADUser in $ADUsers) {

    $NewUPN = $ADUser.UserPrincipalName

    switch -Regex -CaseSensitive ($ADUser.UserPrincipalName) {
        'Ä' { $NewUPN = $NewUPN -replace 'Ä','A' }
        'ä' {  $NewUPN = $NewUPN -replace 'ä','a' }
        'Ë' {  $NewUPN = $NewUPN -replace 'Ë','E' }
        'ë' {  $NewUPN = $NewUPN -replace 'ë','e' }
    }

    $ADUser | Set-ADUser -UserPrincipalName $NewUPN

}

Let me know how you get on.