Use the Set-ExchangeAssistanceConfig cmdlet to modify Microsoft Exchange Help configurations for your organization. Out-of-the-box OWA and ECP users will be redirected to help.outlook.com, which contains Office 365 and Live@edu specific settings which can be misleading.
To make changes read more at, http://technet.microsoft.com/en-us/library/dd298070.aspx.
Daniel Noakes