How do I make the email field required on the web portal?

How do I make the email field required on the web portal?


On the PassagePoint application server, navigate to "PPGlobal\Config\context\1\main.ctx" 
1) Edit the 'options.xml' file using any text editer
2) update <isEmailRequired> from "false" to "true"

   <isEmailRequired>true</isEmailRequired>

3) Restart the PassagePoint services for the changes to take affect