When you re trying to execute PowerShell scripts from a new server you may have to import .PublishSettings file from Azure environment and import into the new machine. This is a one time activity which allows you to execute Azure Powershell commands.
This file can be downloaded from: https://manage.windowsazure.com/publishsettings
The file will be unique for each user which contain secured information related to your account access.
How to import: cmdlet: Import-AzurePublishSettingsFile .publishsettings