Domain Controller alarm

Domain Controller alarm

I keep getting this alarm on the domain controller

AuthenticationFailure : .1.3.6.1.4.1.311.1.1.3.1.3 ADNY Hardware: x86 Family 15 Model 2 Stepping 9 AT/AT COMPATIBLE - Software: Windows 2000 Version 5.0 (Build 2195 Multiprocessor F

The SNMP star is working and it is pulling data in.
Any idea what could be causing this?




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