param([Parameter(Mandatory=$true)][string]$hostname)

#-----------------------------------------------------------------------
#- Get-SavedCredentials
#-----------------------------------------------------------------------
function Get-SavedCredentials {
    $savedCredentials = C:\Windows\System32\cmdkey.exe /list | Select-String 'TERMSRV/' | ForEach-Object {
        Write-Output ($_.ToString().Replace('Target: LegacyGeneric:target=','')).Trim()
    }
    return $savedCredentials
}

#-----------------------------------------------------------------------
#- Remove-SavedCredentials
#-----------------------------------------------------------------------
Function Remove-SavedCredentials {
    Get-SavedCredentials | ForEach-Object {
        $formattedEntry = $_.Replace('Target: Domain:target=','')
        C:\Windows\System32\cmdkey.exe /delete:$formattedEntry
    }
}

#-----------------------------------------------------------------------
#- Add-SavedCredential
#-----------------------------------------------------------------------
Function Add-SavedCredential {
    param([string]$hostname,[string]$savedCredentialPath='C:\users\paul\Documents\encCrd.xml')
    $ec = Import-CliXML -Path $savedCredentialPath
    $username = $ec.Username.ToString().Trim()
    $password = $ec.GetNetworkCredential().Password.ToString().Trim()
    C:\Windows\System32\cmdkey.exe /generic:TERMSRV/$hostname /user:$username /pass:$password
    Remove-Variable ec,username,password
}

#-----------------------------------------------------------------------
#- Main
#-----------------------------------------------------------------------

Remove-SavedCredentials
Add-SavedCredential -hostname $hostname