SharePoint 2013 PowerShell Script to Migrate Users from one domain to another

Open PowerShell window in your system.

Paste the below code in your PowerShell window.

Run the script.

Add-PSSnapin Microsoft.SharePoint.PowerShell

#Import data from CSV file
$UserData = Import-CSV -path "C:\GowthamTestuser.csv"

#Iterate through each Row in the CSV
foreach ($Row in $UserData)
 {
    write-host "Processing user:" $row.Email

    #Site collection URL
    $siteURL ="https://gowthamSPDEV.microsoft.com"
    $site = Get-SPSite $siteURL

    foreach($web in $site.AllWebs)
     {
        #Get All Users
        $UserColl = Get-SPUser -web $web.Url

        foreach ($User in $UserColl)
        {
            #Get values from CSV File
            $OldUserID= $Row.OldUserID.Trim()
            $NewUserID =$Row.NewUserID.Trim()
            $Email = $Row.Email.Trim()

            #Search for Old User Accounts
            if($User.UserLogin.Contains($OldUserID))
             {
                #Update the User E-mail
                Set-SPUser -Identity $User.UserLogin -Email $Email -Web $web.URL

                $NewUser = $User.UserLogin.replace($OldUserID, $NewUserID)

                #Migrate user from Old account to new account - migrate users to new domain
                Move-SPUser -Identity $User -NewAlias $NewUser -IgnoreSID -confirm:$false
                write-host "User Migrated: $($User.userlogin) at site $($web.Url)"
             }

        }
    }
}

This PowerShell script migrates users to new domain programmatically.