Warning for large Kerberos tickets

This policy setting allows you to configure at what size Kerberos tickets will trigger the warning event issued during Kerberos authentication. The ticket size warnings are logged in the System log.

If you enable this policy setting, you can set the threshold limit for Kerberos ticket which trigger the warning events. If set too high, then authentication failures might be occurring even though warning events are not being logged. If set too low, then there will be too many ticket warnings in the log to be useful for analysis. This value should be set to the same value as the Kerberos policy "Set maximum Kerberos SSPI context token buffer size" or the smallest MaxTokenSize used in your environment if you are not configuring using Group Policy.

If you disable or do not configure this policy setting, the threshold value defaults to 12,000 bytes, which is the default Kerberos MaxTokenSize for Windows 7, Windows Server 2008 R2 and prior versions.

Supported on: At least Windows Server 2012, Windows 8 or Windows RT
Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Microsoft\Windows\CurrentVersion\Policies\System\KDC\Parameters
Value NameEnableTicketSizeThreshold
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

Ticket Size Threshold

Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Microsoft\Windows\CurrentVersion\Policies\System\KDC\Parameters
Value NameTicketSizeThreshold
Value TypeREG_DWORD
Default Value12000
Min Value12000
Max Value2147483647

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