Change of Name in Active Directory and Exchange on premises through Powershell

This is quite simple. Use the script below. Let me know if you have any issues...

CSV should be constructed like below...

sam            First    Last       DisplayName   NewPrim                                     AdditionalAlias
 msmith     Mike   Smith    Mike Smith       msmith@ex.com         mike.smith@example.com
 jlows          Jean    Lows     Jean Lows          jlows@ex.com                  jean.lows@ex.com

Import-Module activedirectory
Add-PSSnapin microsoft.exchange.management.powershell.admin
$Data = Import-csv "c:\filename.csv"

    ForEach ($line in $Data) 
        {
            $line.sam
            $line.First
            $line.Last
            $line.DisplayName
            $line.NewPrim
            $line.AdditionalAlias

            Set-ADUser -Identity $line.sam -GivenName $line.First -Surname $line.Last -DisplayName $line.DisplayName

            Set-Mailbox -Identity $line.sam -EmailAddressPolicyEnabled $false -EmailAddresses $line.AddtionalAlias

            Set-Mailbox -Identity $line.sam -PrimarySmtpAddress $line.NewPrim


}

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You need to change the second line "Add-PSSnapin" to whatever version of Exchange you are running. You need to have both Active Directory and Exchange snapins in the powershell session for this to work as we are calling different cmdlets.

Will.