Error 0x80040D73

Value: -2147218061 | 0x80040D73 | 2147749235

What does it mean ?

GTHR_E_UNABLE_TO_READ_EXCHANGE_STORE  
The administrative data from the Exchange store or registry cannot be read. Check that the Exchange store is started, and that it was properly restored.
Value: 3443 | 0x0D73 | 0b0000110101110011

Where does it come from ?

FACILITY_ITF  
COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

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