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POConsuming a WCF with an Identity set on Endpoint: correct UPN does not work
 

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  1. POConsuming a WCF with an Identity set on Endpoint: correct UPN does not work
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    <p>I wrote a Windows Service hosted WCF service. Deployed or localhost works fine, my client app can consume it.</p> <p>If I change the LogOn setting of the Windows Service and set a domain user (changing from the default "Local System") my client app cannot consume the service anymore. The exception I get is </p> <pre><code>A call to SSPI failed </code></pre> <p>There is no inner exception or any details. To fix this I tried to set the UPN in my client app request in order to get a valid service name check. This is done, client side, via code, setting an Identity in the endpoint:</p> <pre><code>string uri = "myServiceUri"; EndpointIdentity identity = EndpointIdentity.CreateSpnIdentity("user@domain"); EndpointAddress epa = new EndpointAddress(uri, identity, new AddressHeader[] { }); </code></pre> <p>There comes the very strange behavior.</p> <ul> <li><p>If I set the exact UPN in my client request, lets say "user@domain", I get a new exception (no inner exception, no details)</p> <pre><code>The following remote identity failed verification: 'user@domain' </code></pre></li> <li><p>If I set any other string as UPN in my client request, it works fine, let's say "<em>XXXuser@domainXXX</em>", "<em>toto</em>", or even <em>String.Empty</em>.</p></li> </ul> <p>Server side, I did not set any Identity node in config file to keep default behavior, ie UPN check (no SPN nor DNS).</p> <p>In other words, the Service/User name check seems to work only if the settings in my client app is <em>wrong</em>.</p> <p>Dear community, your help would be very appreciated on this topic.</p> <p>Thanks</p>
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