When configuring a distributed environment with an IIS web server, it may be necessary for detailed error messages to be displayed when the error is encountered by component on a separate host machine. Setting this up is typically done for lower environments, like development or test, or when troubleshooting other issues since the detailed messages are more useful than the default HTTP error codes output by IIS.
To enable this feature, perform the following:
This change will allow remote requests to display detailed errors rather than custom error pages.
Note: If the above steps do not solve the issue, perform the following:
Edit web.config located in the <IIS_DOCUMENT_ROOT> directory.
Find the <system.webServer> element and add or replace (if it exists) the following line:
With the following line
<httpErrors existingResponse="PassThrough" errorMode="Detailed"></httpErrors>
Restart the web server.
This article applies to all versions of on-premise installations of Appian using Internet Information Services 7.x and later as a web server.
Last Reviewed: February 2017
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