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Caller Computer Name Workstation, In a past post, we discussed how to The caller computer name is "WORKSTATION", super descriptive right? There are no invalid logins before the account gets locked out. exe as the caller process name. Found that to When I check the security logs on the domain controller, I get a "caller Computer Name" in the lockout event that references a computer not on our network, that does not fall within Additional Inforation: Caller Computer Name: There are no apparent failures before the lockout, just THAT. I have zero idea what's triggering it. Regarding the "Caller Machine Name" showing as WORKSTATION in the Account Lockout Analyzer, this behavior is actually originating from the . We have 2 domain controllers, from yesterday we are seeing event ID 4740 for a user (which is used to manage 4 oracle database windows Hi my domain user id get locked frequently. On any of these events for any users. As mentioned in my comment below, I turned up logging, The PDC Emulator DC is running Server 2008 R2 Std. I've searched DNS and DHCP and I can't find any machine with In trying to troubleshoot the source of an AD account lockout, I see now that the “caller computer name” is no longer the name of the actual computerit’s something like "Windows2012 or Caller Computer: The Caller Computer the computer from which failed authentication attempts are originating. To understand further on how to resolve Find answers to Account lockout and strange called computer names from the expert community at Experts Exchange From what I’ve noticed, If caller computer is empty it pretty much always means a mobile device. If it’s coming from Windows OS, caller computer Regarding the "Caller Machine Name" showing as WORKSTATION in the Account Lockout Analyzer, this behavior is actually originating from the Domain Controller logs rather than an issue within I looked at the event viewer event ID 4740 to try to narrow down the computer causing the lock out but the caller Machine is not being displayed. 0. The “WORKSTATION” was actually a personal device connection from a Microsoft Exchange Connection for the user that was getting locked out. When I checked the event IDs on PDC 4740/4625 it showed the caller computer as another DC, and when I checked the event ID 4771 on the DC which was I notice that each of the events contains the line Caller Computer Name: NL, the Microsoft documentation for 4740 say that it contains: the name of User accounts are getting locked frequently and the Caller Computer Name empty is empty or it shows 0. I could see the some accounts which Caller Computer Name: Using the advice from u/RyanSmithLV I had already enabled debug mode on our DCs using "Nltest /DBFlag:2080FFFF" from an elevated command prompt. It may be blank when you look it up which we will deal with here: No Caller Computer I looked at the event viewer event ID 4740 to try to narrow down the computer causing the lock out but the caller Machine is not being displayed. The more recent log entry had the w3wp. Event ID 4740 is logged for the lockout but the Caller Computer Name is blank: The lockout origin DC is running Server 2003 these are pretty generic names, especially "WORKSTATION" which is more typical for windows, but we only have macOS devices that could come into question. Our DC01 is the I have tried just about every thing suggested on the web to find the source of a lock out. But many times we get blank called computer name in the alert doesnt even show IP Troubleshooting an Active Directory account lockout when the Caller Computer Name is blank can be a pain. Security ID: mydomain\helpdesk Account Name: helpdesk Additional Information: Caller Computer Name: SHIELD suggestions on how to find the culprit? I have configured AD policy and alerts email for account lockout when event id 4740 is triggered. end use do not aware of my domain controller details. Caller Computer Name [Type = UnicodeString]: the name of computer account from which logon attempt was received and after which target account was locked out. I made a script to remove all of this We are having these random occurrences where users are reporting account lockouts, and in searching logs for 4740 events, it gives the source as being "WORKSTATION" which does not fit our computer Logon into the computer mentioned on “Caller Computer Name” (DEMOSERVER1) and look for one of the aforementioned reasons that produces the problem. The problem is, the caller machine is not part of any Both had the same network info (Workstation name, source network address, and source port). They do not have access to We have two Domain controller DC01 and DC02 in our Domain, this morning one of the user accounts got locked out so we tried to find out the cause of the event. The event id 4740 show caller pc as domain controller. the Hi Rizwan, Thank you for reaching out. 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