Hi, What I'am doing is the opposite of making a form post SSO; I change the OWA setup from form-post to standard authentication methods with integrated authentication or basic authentication (but please use SSL to your OWA server as well). If you do it this way, you have a very easy hassle free SSO for your OWA solution, if it's OWA2000, OWA2003 or even OWA2007. How? Follow the steps below (OWA 2003): Configuring the Exchange Server for standard-based authentication Authentication To enable standard -based authentication: 1. On the Exchange server, log on with the Exchange administrator account, and then start Exchange System Manager. 2. In the console tree, expand Servers. 3. Expand the server for which you want to enable forms-based authentication, and then expand Protocols. 4. Expand HTTP, right-click Exchange Virtual Server, and then click Properties. 5. In the Exchange Virtual Server Properties dialog box, on the Settings tab, in the Outlook Web Access pane, select the Enable standard Based Authentication option. 6. Click Apply, and then click OK. After you change the OWA from form-based to standard based authentication; you can set a SSO based on NTLM-auth on the IVE with the logon credentail variables (<USER> and <PASSWORD>) Good luck, Dennis ... View more