# Nagios Exchange 2010 Backup Monitoring Script
# Author: Andy Grogan
# Version 1.0
# www.telnetport25.com
# ----------------------------------------
# Compatibility:
# ----------------------------------------
# Nagios Version: 3.x
# Exchange Version: 2010
# Powershell Version: 2.0
# NSClient++ Version: 3.x
# ----------------------------------------

Add-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010
$localServerName = Get-WmiObject -Class Win32_ComputerSystem | Select Name
$ThreshHold = 2
$Results = Get-MailboxDatabase -Server $localServerName.Name -Status | Select Identity,Server,LastFullBackup | where {$_.Server -eq $localServerName.Name}

foreach($itm in $Results){
	
		if($itm -eq $null){
			$Output = "OK: No Databases are active on this host"
			$NagiosResult = 0
		}else{
			if($itm.LastFullBackup -eq $null){
				$lastBackupSeed = 9999
				
			}else{
				$lastBackupSeed = New-TimeSpan $($itm.LastFullBackup) $(Get-Date)
			}
			if($lastBackupSeed.days -gt $ThreshHold -or $lastBackupSeed -eq 9999){
				$Res = "CRITICAL: Database Backup out of Schedule: " + $itm.Identity
				$Output += $Res + " "
				$statFlag = 1
			}else{
				$Output += "OK: Database: " + $itm.identity + " has a recent backup" + " "
			}
		}
}
Write-Host $Output
if($statFlag -eq 1){
	exit 2
}else{
	exit 0
}