Event ID 4824: Kerberos preauthentication by using DES or RC4 failed because the account was a member of the Protected User group
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.
Kerberos preauthentication by using DES or RC4 failed because the account was a member of the Protected User group.
Event 4824
Security-Auditing
Security log
Audit
Message and fields (as Event Viewer shows them)
Kerberos preauthentication by using DES or RC4 failed because the account was a member of the Protected User group.
Account Information:
Security ID: …
Account Name: …
Service Information:
Service Name: …
Network Information:
Client Address: …
Client Port: …
Additional Information:
Ticket Options: …
Failure Code: …
Pre-Authentication Type: …
Certificate Information:
Certificate Issuer Name: …
Certificate Serial Number: …
Certificate Thumbprint: …
Certificate information is only provided if a certificate was used for pre-authentication.
Pre-authentication types, ticket options and failure codes are defined in RFC 4120.
If the ticket was malformed or damaged during transit and could not be decrypted, then many fields in this event might not be present.