powershell command to configure autodiscover

Hello everyone i want to configure autodiscover on exchange server 2007 sp1

please do guide me the powershell command to setup autodiscover.

PS] C:\Users\Administrator.\Desktop>Get-ActiveSyncVirtualDirectory | fl

ActiveSyncServer: https://mail.mydomain.com/
MetabasePath    : IIS://MAIL.mydomain.com/W3SVC/1/ROOT/Microsoft-Server-ActiveSync
ClientCertAuth  : Ignore
Server          : MAIL
InternalUrl     : https://mail.mydomain.com/Microsoft-Server-ActiveSync
InternalAuthenticationMethods : {}
ExternalUrl     : https://mail.mydomain.com/
ExternalAuthenticationMethods : {}
OriginatingServer: MAIL.mydomain.com

Get-ClientAccessServer | fl Namae,AutoDiscoverServiceInternalUri
Name                           : MAIL
AutoDiscoverServiceInternalUri : https://mail.mydomain.com/autodiscover/autodiscover.xml

Get-ClientAccessServer | fl Name,AutoDiscoverServiceExternalUri
Name : MAIL

[PS] C:\Users\Administrator.Mydomain\Desktop>Get-AutodiscoverVirtualDirectory | ft *url*

InternalUrl                                                                     ExternalUrl
-----------                                                                     -----------

I want EMS command to configure autodiscover
my exchange server hostname is mail and domain mydomain.com
please guide me the commands to configure autodiscover properly