Intermittent Oracle Access Manager Operation Error ErrNoFormUrl With Chained Non-IIS WebGate to IIS IWA WebGate Authentication

(Doc ID 1076960.1)

Last updated on MARCH 08, 2017

Applies to:

COREid Access - Version: to - Release: 10g to
Information in this document applies to any platform.


In an Oracle Access Manager (OAM) 10.1.4 environment where a non-IIS application WebGate is redirecting to a Microsoft IIS WebGate for Integrated Windows Authentication (IWA) users intermittently see the following error:

Oracle Access Manager Operation Error
The form authentication scheme Form login for Non-IIS IWA does not have a challenge parameter form:formURL, where formURL is the URL of the login form.

'Non-IIS IWA' in the above error text is the name of the Form authentication scheme configured in the Policy Domain protecting the resources deployed on the non-IIS application webgates, so this name will differ according to the environment.

The URL displayed in the address bar is something like

The authentication schemes have been configured following the instructions in <> - How To Setup Integrated Windows Authentication (IWA) as an Authentication WebGate.

IWA login to resources deployed on the IIS WebGate succeeds every time without any errors.&nbsp;

The issue is specific to protected resource access via non-IIS WebGates.

Steps to reproduce

1. Login to the Windows domain on a client PC and start a new browser session.
2. Access a protected resource deployed on the non-IIS WebGate.
3. In most cases this first time the IWA authentication will succed and the resource will be displayed.
4. Close the browser.
5. Open a new browser session.
6. Access a protected resource deployed on the non-IIS WebGate again.
7. 'Oracle Access Manager Operation Error' should occur. If not then repeat steps 4 - 6 again until it occurs.


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