Error 0xC00D2EF7

Value: -1072877833 | 0xC00D2EF7 | 3222089463

What does it mean ?

NS_E_PROXY_SOURCE_ACCESSDENIED  
The proxy could not provide valid authentication credentials to the media server.
Value: 12023 | 0x2EF7 | 0b0010111011110111

Where does it come from ?

FACILITY_MEDIASERVER  
Windows Media Server
Value: 13 | 0x00D | 0b00001101

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