Note
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After installing Duet, there could be an issue getting SPNego to work. The issue can manifest in the following way:
Browsing to will result in a successful response.
Browsing to will result in a 401 “not authorized”.
The problem is documented in KB Article 899417. To make this work as expected make sure that the key FEATURE_ENSURE_FQDN_FOR_NEGOTIATE_KB899417 is created in the following ___location:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl
Under that key, add the DWORD keys explorer.exe and iexplore.exe with a value of 1.
Restart the browser and it should work as expected.