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Authentication exception when using an NLB solution with Workflow Manager


When process system processes an order and the workflow manager installation is setup using a NLB solution you might receive this error.

Error: Microsoft.Workflow.Client.AuthenticationException: A response was returned that did not come from the Workflow Manager. Status code = 401


With Windows Server 2003 SP1 a loopback security check was introduced, and this is what is causing this error.

Check following links for solution.

Troubleshooting guidelines