How to Access outlook web apps using Email address not by Domain user name?

Hi All,

I have AD setup name like abcd.local and user login format is employ ID like (TR012). we had deployed  the Exchange recently and we enable the outlook web app. my E-mail format is (first name. last name @ abcd.com.in) format.  when I open the outlook  web app it ask me domain\ user name to login to OWA. Is there any way to access OWA using the Email address not using domain user name ??

Thanks and regards,

Darpan Deep

Dipendra Paudel