We are not able to change password through OWA form which is published through ISA 2006.It gives an "Credentials entered are not valid" error.
The configuration of Exchange and ISA is as follows:
In Exchange 2007 Basic Authentication is enabled.
ISA 2006 is installed in a Load Balancing mode.And ISA is installed as a Domain member.
While publishing OWA through ISA we used the authentication as Windows (Active directory).
We also tried to configure LDAP in ISA and changed the authentication of OWA listner in ISA as LDAP(Active Directory).After doing that when we tried to change the password & it gave a "page cannot be displayed-Internal server 500 error".
So we removed LDAP authentication and changed it to Windows (Active Directory) now we get an error which says :"Credentials entered are not valid" error it happens for all the users.
Thanks and regards