Grande número de events com evento id 4625 win 2012 serrview

Estou recebendo um grande número de 4625 events no server Win 2012. Abaixo estão os detalhes do evento. O nome da conta e o nome da estação de trabalho são iguais e é o nome do host da máquina na qual eu estou recebendo events "Uma conta na ausência de logon". Alguém poderia me ajudair a resolview isso.

Log Name: Security Source: Microsoft-Windows-Security-Auditing Date: 05/01/2017 6:47:08 AM Event ID: 4625 Task Category: Logon Level: Information Keywords: Audit Failure User: N/A Computer: http://(ServiewHostname).example.com Description: An account failed to log on. Subject: Security ID: NULL SID Account Name: - Account Domain: - Logon ID: 0x0 Logon Type: 3 Account For Which Logon Failed: Security ID: NULL SID Account Name: ServiewHostname Account Domain: example Failure Information: Failure Reason: Unknown user name or bad password. Status: 0xC000006D Sub Status: 0xC0000064 Process Information: Caller Process ID: 0x0 Caller Process Name: - Network Information: Workstation Name: ServiewHostname Source Network Address: ::1 Source Port: 50364 Detailed Authentication Information: Logon Process: NtLmSsp Authentication Package: NTLM Transited Services: - Package Name (NTLM only): - Key Length: 0