Param(
  [string]$Server
)



$DB = "primarydb"


$status = 0

add-pssnapin Microsoft.Exchange.Management.PowerShell.SnapIn


# Get Database stuff
$Database = Get-MailboxDatabase | Where-Object {$_.Name -eq $DB}

# Establish desired state by querying for first database in the database activation preference order
$GetPrefOrder = $Database.Servers
$DefaultDBServer = $GetPrefOrder[0]



# Filter for failed over database

$FailedoverMDB = $Database | Where-Object {$_.Server -ne $DefaultDBServer}

#write-host $Database
#write-host $DefaultDatabase
#write-host $FailedoverMDB.Length



if($FailedoverMDB.Length -gt 0) {

    $status=2
    $NowDB = Get-MailboxDatabase | Where-Object {$_.Name -eq $DB}
    $NowDBName = $NowDB.Name
    $NowServer = $NowDB.Server
    $desc = "Database Failover Event => $NowDBName is active on $NowServer"
}

if ($status -eq "2") {
    Write-Host "CRITICAL: $desc"
} elseif ($status -eq "0") {
    Write-Host "OK: $DB is active on $Server"
}

exit $status