Kerberos preauthentication by using DES or RC4 failed because the account was a member of the Protected User group

Operating SystemsWindows 2012 R2 and 8.1
Windows 2016 and 10

• SubcategorySystem
• Other System Events
Type Failure


Corresponding events
in Windows 2003
and before

This event is new to Server 2012 R2. It does not appear in earlier versions.

Kerberos preauthentication by using DES or RC4 failed because the account was a member of the Protected User group.

Account Information:
Security ID: %2
Account Name: %1

Service Information:
Service Name: %3

Network Information:
Client Address: %7
Client Port: %8

Additional Information:
Ticket Options: %4
Failure Code: %5
Pre-Authentication Type: %6

Certificate Information:
Certificate Issuer Name: %9
Certificate Serial Number: %10
Certificate Thumbprint: %11

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.

See Also: A security-enabled local group was changed

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