Project Server 2007: PSI – Getting 401 Errors from IIS?

This was a problem that had several of us racking our brains earlier this week and all the usual reasons of lack of permissions in PWA, missing setting the credential properties on the web service were found not to be the cause – Colby Africa had found a KB that sounded very similar and we had an answer.  See Colby’s posting at his new blog site

This same problem then appeared through an e-mail contact from my blog so thanks to Colby I could give a quick answer!  In this customer’s case the issue was due to host headers being used – KB 896861 saved the day.

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