Error 0x800721AD

Value: -2147016275 | 0x800721AD | 2147951021

What does it mean ?

ERROR_NO_WRITABLE_DC_FOUND  
Could not find a writable domain controller in the domain.
Value: 8621 | 0x21AD | 0b0010000110101101

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

StackOverflow

Other Errors for FACILITY_WIN32