Error 0x800720BC

Value: -2147016516 | 0x800720BC | 2147950780

What does it mean ?

ERROR_DS_DUP_MAPI_ID  
Schema update failed: duplicate MAPI identifier.
Value: 8380 | 0x20BC | 0b0010000010111100

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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