Error 0x800721C5

Value: -2147016251 | 0x800721C5 | 2147951045

What does it mean ?

ERROR_DS_UNDELETE_SAM_VALIDATION_FAILED  
The undelete operation failed because the Sam Account Name or Additional Sam Account Name of the object being undeleted conflicts with an existing live object.
Value: 8645 | 0x21C5 | 0b0010000111000101

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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