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I have client who has installed our Silverlight app. The app works fine when running from the IIS server. It also works from a client machine – but only if the user is logged in as local admin. If they log in with a non-admin account, they get a blank screen where the silverlight app should be.
When I look in the server logs I see that the XAP is being blocked, getting 401 response code.
Any suggestions? It feels like this has to do with accounts, which I am no expert in.
There is probably something wrong in the IIS security settings.
Is Anonymous authentication activated in IIS?