Outlook Web Access Native Client

I am looking for someone who knows how EWS for Outlook Web Client works and is able to extract information from OWA and display them into a custom android email client. What i'm after is similar to apps like MobiMail, OWA Mail, Outlook Mobile Access Lite which is already available in Google Play. What these apps don't do is what i need to be incorporated into a new OWA app. I would like the authentication method to be refined so that it can be configured to accept different methods of authentication. For example most OWA only ask for a user name and password. However some are more specific. This app should be able to be configurable so that it can either do standard username/pwd or the following: 1. First screen will ask for an email address 2. 2nd screen will ask for a secret password eg" What's your dog's name 3. Username/Pwd For point 1 above, this should be asked one time and saved but can be reconfigured in settings. For Point 2, this will need to be asked all the time as this can be a random question out of 10. For Point 3, this should be asked one time and saved but can be reconfigured in settings. Of course with this new app i'd like it to have all the functionality that the web version has. Eg send/receive emails, reply, reply all, forward, calendar, set up meetings, accept meetings, out of office enable/disable etc...