On our old extranet software we standardized the users to login via their email address along with a password.  When we moved forward with DNN for our new extranet using forms authentication with Active Directory we ran into the problem where older users on our systems couldn't login via their email address due to the fact that the AD account name and email prefix didn't always match.  Training the users to enter <domain_name>/<username> would be to time consuming for us plus our users would grumble from the change.

The solution was very easy but I wondered if anyone knew of any side effects.  I've been testing it for the past day and haven't found any as of yet and the users testing the application are singing praises.  In file  \\<dnn_source>\Library\Components\ADSI\Utilities.vb

        Public Shared Function GetUserEntryByName(ByVal Name As String) As DirectoryEntry
            ' Create search object then assign required params to get user entry in Active Directory
            Dim objSearch As New ADSI.Search(GetRootDomain)
            Dim userEntries As ArrayList
            Dim userEntry As DirectoryEntry
            Dim userDomain As ADSI.Domain

            With objSearch
                .AddFilter(ADSI_CLASS, ADSI.CompareOperator.Is, Authentication.ObjectClass.person.ToString)
                '.AddFilter(ADSI_ACCOUNTNAME, ADSI.CompareOperator.Is, TrimUserDomainName(Name))
                .AddFilter(ADSI_EMAIL, ADSI.CompareOperator.Is, Name) 'FAZCHANGE -- Filter on email address instead of account name.

Changes to the cold are in bold.