Exchange InternalUrl and ExternalUrl settings

hi

I have just installed a new Exchange 2013 SP1 Server and outlook is giving proxy certificate errors and ssl cert is looking for the local machine name instead of the purchased cert remote.domain.com

I have ran these commands to get current settings:

[PS] C:\Windows\system32>Get-WebServicesVirtualDirectory | Select InternalUrl,BasicAuthenticationExternalUrl,Identity |
Format-List


InternalUrl                    : https://remote.erewash-partnership.com/ews/exchange.asmx
BasicAuthenticationExternalUrl :
Identity                       : EPL-SERVER2012\EWS (Default Web Site)



[PS] C:\Windows\system32>Get-OabVirtualDirectory | Select InternalURL,ExternalURL,Identity | FL


InternalUrl : https://remote.erewash-partnership.com/oab
ExternalUrl :
Identity    : EPL-SERVER2012\OAB (Default Web Site)



[PS] C:\Windows\system32>
[PS] C:\Windows\system32>Get-ActiveSyncVirtualDirectory | Select InternalUrl,ExternalUrl,Identity | fl


InternalUrl : https://epl-server2012.epl.local/Microsoft-Server-ActiveSync
ExternalUrl :
Identity    : EPL-SERVER2012\Microsoft-Server-ActiveSync (Default Web Site)


So to fix I have tried these commands:

Set-ClientAccessServer -Identity "epl-server2012" -AutodiscoverServiceInternalUri https://remote.erewash-partnership.com/Autodiscover/Autodiscover.xml
Set-WebServicesVirtualDirectory -Identity "epl-server2012\EWS (Default Web Site)" -InternalUrl https://remote.erewash-partnership.com/ews/exchange.asmx
Set-OABVirtualDirectory -Identity "epl-server2012\oab (Default Web Site)" -InternalUrl https://remote.erewash-partnership.com/oab 
Set-AutodiscovervirtualDirectory -Identity "epl-server2012\autodiscover (Default Web Site)" -InternalUrl https://remote.erewash-partnership.com/autodiscover/autodiscover.xml
Set-AutodiscovervirtualDirectory -Identity "epl-server2012\autodiscover (Default Web Site)" -ExternalUrl https://remote.erewash-partnership.com/autodiscover/autodiscover.xml
Set-ActiveSyncVirtualDirectory -Identity "Microsoft-Server-ActiveSync (Default Web Site)" -InternalUrl "https://remote.erewash-partnership.com/Microsoft-Server-ActiveSync"

The first 3 seem to do something but the last 3 are giving the following type of errrors!

A parameter cannot be found that matches parameter name 'InternalUrl'.
    + CategoryInfo          : InvalidArgument: (:) [Set-AutodiscoverVirtualDirectory], ParameterBindingException
    + FullyQualifiedErrorId : NamedParameterNotFound,Set-AutodiscoverVirtualDirectory
    + PSComputerName        : epl-server2012.epl.local


Please advise

Ash