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Event ID 6425: A network client used a legacy RPC method to modify authentication information on a trusted domain object

Windows Event ID Lookup: What Windows event IDs mean: 4625, 4624, 4740, 6008, 41, 7045, 1102 and 3,000 more, with Windows' own message text, the fields and what to check.

Look up a Windows event ID from Event Viewer, a SIEM alert or a log export: what it means, the fields it records, and what to check. Many IDs are used by more than one source (event 41 is both a Kernel-Power crash and a boot error), so every definition is shown, the one people usually mean first. The message text is Windows' own, read from the event providers of Windows 10.0.26200.0, 2026-10-28; the notes are ours, based on Microsoft's security auditing reference.

Try: 4625, 4624, 4740, 6008, 41, 1074, 7045, 1102, 4104, 1149

A network client used a legacy RPC method to modify authentication information on a trusted domain object.

Event 6425
Security-Auditing
Security log
Audit
Message and fields (as Event Viewer shows them)
A network client used a legacy RPC method to modify authentication information on a trusted domain object. The authentication information was encrypted with a legacy encryption algorithm. Consider upgrading the client operating system or application to use the latest and more secure version of this method.

Trusted Domain:
	Domain Name:		…
	Domain ID:		…

Modified By:
	Security ID:		…
	Account Name:		…
	Account Domain:		…
	Logon ID:		…

Client Network Address:		…
RPC Method Name:		…

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