Error 0xC8000231

Value: -939523535 | 0xC8000231 | 3355443761

What does it mean ?

hrBadBackupDatabaseSize  
The backup database size must be a multiple of 4K (4096 bytes).
Value: 561 | 0x0231 | 0b0000001000110001

Where does it come from ?

FACILITY_NTDSB  
Active Directory Domain Services
Value: 2048 | 0x800 | 0b100000000000

Other Errors for FACILITY_NTDSB