Error 0x800721C9

Value: -2147016247 | 0x800721C9 | 2147951049

What does it mean ?

ERROR_DS_MISSING_FOREST_TRUST  
The operation failed because the addition/modification referenced an inbound forest-wide trust that is not present.
Value: 8649 | 0x21C9 | 0b0010000111001001

Where does it come from ?

FACILITY_WIN32  
Provides a way to handle error codes from functions in the Win32 API as an HRESULT. (Error codes in 16 - bit OLE that duplicated Win32 error codes have also been changed to FACILITY_WIN32)
Value: 7 | 0x007 | 0b00000111

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