Firewall ports that need to be open between Server having exchange management shell and the Exchange server

Hi,

I am trying to create a new mailbox from remote Exchange management shell. I get the error

"An exchange 2007 server on which an address list service is active cannot be found."

Please advise on this.

Please also let me know which ports need to be open in the firewall between the server having Exchange management shell and the Exchange Server.

Thanks,

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