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Event ID: 40960 Source: LsaSrv

Source
LsaSrv
Level
Error
Description
The Security System detected an attempted downgrade attack for server <server name>. The failure code from authentication protocol Kerberos was "<error message> (<hex error code>)".
Source
LSASRV
Level
Warning
Description
The Security System detected an authentication error for the server <service>/<server name>. The failure code from authentication protocol Kerberos was "<error description> (<error code>)".

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