# Script to bulk reset a list of user passwords in Active Directory
# The list needs to be a list of user id's one per line.

# import the AD module
if (-not (Get-Module ActiveDirectory)){
    Import-Module ActiveDirectory -ErrorAction Stop            
}

$Password = Read-Host .AsSecureString "Enter the default password"
$FileName = Read-Host "Enter Txt file name including the .txt extension (full path necessary if file not in same directory as script)"
 
# get list of account names (1 per line)
$list = Get-Content -Path $FileName
 
# loop through the list
ForEach ($u in $list) {
 
    if ( -not (Get-ADUser -LDAPFilter "(sAMAccountName=$u)")) { 
        Write-Host "Can't find $u"
    }
    else { 
        $user = Get-ADUser -Identity $u
        $user | Set-ADAccountPassword -NewPassword $Password -Reset
        $user | Set-AdUser -ChangePasswordAtLogon $true
        Write-Host "changed password for $u"
    }
}