ASP.NET failure when installing Workflow or ServiceDesk
Last Updated December 11, 2013
Workflow or ServiceDesk fails to install due to an ASP.NET failure, as visible in a dialog and the Install.log file.
Failed[ASP.NET may be prohibited in your IIS configuration. Please check IIS web service extensions and ensure that ASP.NET is Allowed.
One possible cause is an extraneous entry in the web extensions.
This error has also been seen when there is a HTTP Redirect on Default Web Site. Part of our detection check is connectivity to a temporary virtual directory that is created as part of the ASP.Net detection process.
This article is written under the assumption that the server is a dedicated Workflow server; it is possible that this may impact other IIS-based applications.
1. Open the IIS Manager.
2. In the center pane, right-click ISAPI and CGI restrictions and choose Open Feature.
3. There should be two items here, both named "ASP.NET v2.0.50727". Anything else is unnecessary and should be removed.
4. Reboot the machine and attempt to install again.
To check if an HTTP Redirect may be causing the issue open a web browser and attempt to go to http://localhost. If you aren't taken to an IIS7 welcome screen then a HTTP Redirect is in place.
To disable the redirect:
Open IIS Manager
Click on Default Web Site
In the left hand pane double click on HTTP Redirect.
Uncheck the Redirect requests to this destination and click Apply in the Actions pane on the far right.
You may reenable the redirect once the installation has completed successfully if you wish.
Workflow 7.1 or 7.5 installation on a Windows 2008 R2 machine.
Imported Document ID: TECH178238
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