Event ID - 5

Event Id	5
Source	Microsoft-Windows-Kerberos-Key-Distribution-Center
Description	The KDC failed to update policy class %1. The error is in the data.
Event Information	According to Microsoft : Cause : This event is logged when KDC failed to update policy class. Resolution : Restart the Kerberos Key Distribution Center (KDC) service To perform this procedure, you must be a member of the Domain Admins group, or you must have been delegated the appropriate authority. To restart the Key Distribution Center (KDC) service: Log on to the domain controller on which the issue is occurring. Click Start , point to Administrative Tools , and then click Services . If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue . Right-click Kerberos Key Distribution Center , and then click Restart . Confirm that Started is displayed in the Status column for the service named Kerberos Key Distribution Center . Close the Services snap-in console. If the Kerberos KDC service does not restart, you should restart the computer. Verify : To perform this procedure, you must be a member of the Domain Admins group, or you must have been delegated the appropriate authority. To verify that the Key Distribution Center (KDC) service is running and operating correctly: Log on to a domain controller. Click Start , point to Administrative Tools , and then click Services . If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue . Confirm that Started is displayed in the Status column for the service named Kerberos Key Distribution Center . If the Kerberos KDC service is started, the KDC service is operating correctly.
Reference Links	Event ID 5 from Microsoft-Windows-Kerberos-Key-Distribution-Center

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