Import-PST.ps1

[CmdletBinding()]
param(
    [ValidateScript({Test-Path $_ -PathType Leaf})]
    [Parameter(Mandatory=$True,Position=1)][string]$CSV,

    [ValidateScript({Test-Path $_ -PathType Container})]
    [Parameter(Mandatory=$True,Position=2)]
    [string]$PSTPath
)

Import-Module ActiveDirectory
if(!(Get-PSSnapin |
    Where-Object {$_.name -eq "Microsoft.Exchange.Management.PowerShell.E2010"})) {
      ADD-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010
}

$start = Get-Date
$startnum = $start -replace "[\W]"
$addomain = [System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain().Name
$logfile = "PSTImportErrors.csv"
$nl = "`r`n"
if(Test-Path $logfile) {Rename-Item $logfile -NewName "$startnum $logfile" }

function writelog([string]$message) {
    $timestamp = Get-Date
    $fc = "White"
    if($message.contains("ERROR")) {$fc ="Red"}
    Add-content $logfile -value "$message"
    Write-Host $message -ForegroundColor $fc
}

writelog "#Import Errors"
writelog "Email,PST"
Write-Host $nl

if($PSTPath.substring($PSTPath.length-1,1) -ne "\") { $PSTPath += "\" }

Import-Csv $csv | ForEach-Object {
    Set-Variable -Name user -Value $null -Scope 0
    Set-Variable -Name mailbox -Value $null -Scope 0
    $email = $_.Email
    $pst = $_.pst
    if($pst.Contains("\\")) {
        $pstfull = $pst
    } else {
        $pstfull = $PSTPath + $pst
    }

    $mailbox = Get-Mailbox $email

    if($mailbox -ne $null) {
        $mir = Get-MailboxImportRequest -mailbox $mailbox
        if($mir -eq $null) {
            Write-Host "Importing PST file $pst for user $email"
            New-MailboxImportRequest -Mailbox $email -Filepath $pstfull -BadItemLimit 200 -AcceptLargeDataLoss -WarningAction SilentlyContinue
        } else {
            Write-Host "Mailbox Import Request already exists for $email"
        }
    }
    else {
        writelog "$email,$pst"
    }
}

$end = Get-Date
$elapsed = $end - $start
Write-Host $nl
Write-Host "Finished import at $end ($elapsed)"