Renew FAST Search Certificate using PowerShell

This script is more useful for the environments that uses self signed certificates for FAST Search

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# Apply Certificate to FAST
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Clear
Remove-PSSnapin AdminSnapIn -ErrorAction SilentlyContinue
Remove-PSSnapin Microsoft.FASTSearch.PowerShell -ErrorAction SilentlyContinue
Remove-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

$userName = "Domain\ServiceAccountName"
$FastContentServiceName = "FAST Content"

write-host "Applying Certificate to FAST" -ForegroundColor Green
#Release worker processess with IISRESET
iisreset

stop-service FAST*

$installerdir = $env:FASTSEARCH + "installer\scripts"
echo $installerdir
cd $installerdir
$pw = ConvertTo-SecureString -AsPlainText -force test
.\ReplaceDefaultCertificate.ps1 -generateNewCertificate $true -certificatePassword $pw
$cert = @(dir cert:\LocalMachine\My -recurse | ? { $_.Subject -eq 'CN=FASTSearchCert' })[0]
$thumb = $cert.Thumbprint

Start-service FAST*

.\SecureFASTSearchConnector.ps1 -certThumbprint $thumb -ssaName $FastContentServiceName -username $userName