We recently installed MS Exchange 2007. We have one CAS server and two mailbox servers, each is a Hub server. When users log on to OWA (Outlook Web Access) they have to enter their username in the form "username" - I set the domain under the Client Accss Server role OWA properties. With OWA 2007, users are forced to strictly use the "username" convention, if they use "domain\username" or more commonly in our case they try to use "firstname.lastname@example.org" the logon failes. With OWA 2003, users could log on using any of the 3 logon styles. I know I can switch between the logon types, but is there a way to replicate the OWA 2003 behavior of allowing any of the logon types?