Error 0x800721B8

Value: -2147016264 | 0x800721B8 | 2147951032

What does it mean ?

ERROR_DS_MAPI_ID_NOT_AVAILABLE  
Schema update failed: There are no MAPI identifiers available.
Value: 8632 | 0x21B8 | 0b0010000110111000

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

Other Errors for FACILITY_WIN32