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SharePoint 2010 on Windows 7 Exception – UserProfileException: Unrecognized attribute ‘allowInsecureTransport’

If you tried installing SharePoint 2010 Beta 2 on Windows 7 (or Windows Server 2008 R2) shortly after its release; you may have ran into the following error:

Failed to create sample data.
An exception of type Microsoft.Office.Server.UserProfiles.UserProfileException was thrown.  Additional exception information: Unrecognized attribute 'allowInsecureTransport'. Note that attribute names are case-sensitive. (C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\WebClients\Profile\client.config line 56)
Microsoft.Office.Server.UserProfiles.UserProfileException: Unrecognized attribute 'allowInsecureTransport'.

This error is caused by a known issue with Token Authentication and WCF. A fix has been released and is now available  at http://go.microsoft.com/fwlink/?LinkID=166231.

If you didn’t uninstall after receiving the error, simply install the hotfix, and re-run the SharePoint 2010 Products Configuration Wizard.

About the Author: Rafael Perez
Rafael Perez is a Managing Consultant for Catapult Systems with 12 years of experience providing custom application development, enterprise solutions and infrastructure services. He specializes in the development of custom solutions leveraging Microsoft Technologies, primarily involving the .NET Framework and SharePoint Products & Services.