When writing articles about configuring the ISA Firewall to publish the FE Exchange Server in a FE/BE Exchange configuration, I sometimes forget to mention that you must disable FBA on the FE Exchange Server itself. The only place that FBA is enabled is on the ISA Firewall or ISA Firewall Array (if you’re using ISA EE).
HTH,
Tom
Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
Email: [email protected]
MVP — Microsoft Firewalls (ISA)