Error 0xC8000423

Value: -939523037 | 0xC8000423 | 3355444259

What does it mean ?

hrTooManyActiveUsers  
There are too many active database users.
Value: 1059 | 0x0423 | 0b0000010000100011

Where does it come from ?

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

Other Errors for FACILITY_NTDSB