$thumb = $cert.Thumbprint
Set-ItemProperty `
-Path "HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp" `
-Name "SSLCertificateSHA1Hash" `
-Value $thumb
Get-ItemProperty `
-Path "HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp" `
-Name "SSLCertificateSHA1Hash"
net stop TermService /y
net start TermService