PowerShell: Export Exchange Mailboxes

Export 1 mailbox

$userAlias="kungfu.panda"
$storageUNC="\\FILESHERVER01\Backups\PSTs"

# Import Exchange Management Powershell
Add-PSSnapin Microsoft.Exchange.Management.PowerShell.SnapIn;

$mailboxRequest=(New-MailboxExportRequest -Mailbox $userAlias -FilePath "$storageUNC\$userAlias.pst").Mailbox

function monitorCompletion($check){
  $migrationStatus=(Get-MailboxExportRequest -Mailbox $check).Status
  $completed=$migrationStatus -like 'Completed'
  if (!($completed)){
      Write-Host -NoNewline "Waiting for $check batch to complete..." 
      $dots=50
      $timeout=10 #10 seconds
      while (!($completed)) {
        $dots-=1;
        #$timeout-=2; # Timeout is optional
        #if($timeout -lt 0){"$timeout seconds have passed. Skip this waiting."; continue;}
        if ($dots -eq 0){Write-Host ".";$dots=50;} # reload dots
        else {Write-Host -NoNewline "."}
        Start-Sleep -s 2
        $completed.Refresh()
        }
    }
  Write-Host "$check batch is completed."
}

# monitorCompletion $userAlias
# There's problem with the "Refresh()" function on 2010 PowerShell instances. Thus, no progress dots can be generated from this function.

Export all Mailboxes

$storageUNC="\\FILESHERVER01\Backups\PSTs"

# Import Exchange Management Powershell
Add-PSSnapin Microsoft.Exchange.Management.PowerShell.SnapIn;

function monitorCompletion($check){
  $migrationStatus=(Get-MailboxExportRequest -Mailbox $check).Status
  $completed=$migrationStatus -like 'Completed'
  if (!($completed)){
      Write-Host -NoNewline "Waiting for $check batch to complete..." 
      $dots=50
      $timeout=10 #10 seconds
      while (!($completed)) {
        $dots-=1;
        #$timeout-=2; # Timeout is optional
        #if($timeout -lt 0){"$timeout seconds have passed. Skip this waiting."; continue;}
        if ($dots -eq 0){Write-Host ".";$dots=50;} # reload dots
        else {Write-Host -NoNewline "."}
        Start-Sleep -s 2
        $completed.Refresh()
        }
    }
  Write-Host "$check batch is completed."
}

$userAliases=Get-Mailbox -ResultSize unlimited
foreach ($userAlias in $userAliases){
  New-MailboxExportRequest -Mailbox $userAlias -FilePath "$storageUNC\$userAlias.pst"
  sleep 10;
  # monitorCompletion $userAlias;
}