First create a new profile or if already has then choose to edit the current email profile and add a new email…..
Now select Microsoft Exchange or Compatible Service, click next to type the server name with user name. (for eg. urmail.domain.com)
before click on Check Name option, ensure that configure ES Proxy settings by selecting More Settings….
Next pop up window shown as click connection tab > Connect using my Local Area Network & select Connect to Microsoft Exchange using HTTP then click on Exchange Proxy Settings….
On next move pop-up exactly type server name.
click Basic Authentication from drop down menu under Use this authentication when connecting to my proxy server for Exchange and click OK
Probably, java script enable is necessary to view it . If asks for password, simply enter password of the a/c. click next to complete the configuration.
Sorry, I missed it….. here is a good reference directly from Micro Soft