how to integrate sharepoint server with exchange server.

hi guys,

     I have installed SharePoint 2013 in windows 2012. This is in another domain. And i have installed exchange server in another domain. I need to configure SharePoint server to with communicate with Exchange server. I have configured SharePoint server with the help of this link.

http://blogs.technet.com/b/mspfe/archive/2013/04/04/new-age-collaboration-with-exchange-2013-and-sharepoint-2013-part-2.aspx

But according to link i would have been asked certificate warning or it would shown OWA link. But when i enter the url nothing displays. Please guide me how to configure for SharePoint server to with communicate with Exchange server.

Thanks

Rajendran.