OAM authetication

Hi Guys,

As per the current environment architecture, AD is integrated with OID, all the user details from AD get auto synced to OID.

Currently, while accessing a form , users get a login page, where they enter user@domain.com, is there a way the authentication to happen by only user name which is "user" rather than user@domain.com?

OID has uid attribute as "user@domain.com" and OAM has been configured to use "uid" to authenticate the user, is there a way to authenticate when user enters just username.

The forms works with user@domain.com, but it requires all database accounts to be modified from user to