Enhanced where-object on large datalist

Enhanced-where-objectLargeDataset.ps1

$msolusers = Get-MsolUser -All | Select-object ObjectId, WhenCreated, LastPasswordChangeTimestamp, @{n="mfaenabled";e={$_.StrongAuthenticationMethods.Count -gt 0}}
$users = Get-AzureADUser -All $true | Select-Object ObjectId, UserPrincipalName, DisplayName, @{n="onpremDN";e={$_.ExtensionProperty.onPremisesDistinguishedName}}, CompanyName, AccountEnabled, UserType

# Create empty array and do a foreach on every item, this takes a few seconds on 30.000 items
$msoluserArray = @{}
$i=0
$msolusers.foreach({
    $msoluserArray["$($psitem.ObjectId)"] = $i
    $i++
})

foreach($user in $users)
{
  $msoluser = $msolusers[($msoluserArray[$user.ObjectId])]
  # do something with this data
}