Sharepoint Configuration for Outlook Web Access on any site
Outlook web access provides view on your exchange folder from any Share point site using Page Viewer Web part with query string parameters configured to display view as per your organization requirement. As OWA designed for intranet therefore it is obviously recommended for intranet portal only. For extranet you may have to go through it with an extra security step as per your OWA configuration. Following technet article provide details of different query string parameter for configuration of your OWA view. http://technet.microsoft.com/en-us/library/bb232199(EXCHG.80).aspx In general following query suffix for Page Viewer WebPart will suffix https://{server name}/owa/?cmd=contents&f=inbox