This KQL query is designed to identify and display events where the "Account Password Not Required" setting has been changed in Active Directory. Here's a simple breakdown of what the query does:

1. Data Source: It looks at the IdentityDirectoryEvents table, which contains events related to identity and directory activities.

2. Filter: It specifically filters for events where the ActionType is "Account Password Not Required changed". This means it only considers events where there has been a change to the setting that determines whether a password is required for an account.

3. Extracting Information:

   • It extracts the new and old values of the setting from the AdditionalFields column using parse_json. This helps in understanding what the setting was changed from and to.

4. Output: The query then selects and displays specific columns:

   • Timestamp: When the change occurred.
   • TargetAccountUpn: The User Principal Name of the account whose setting was changed.
   • TargetAccountDisplayName: The display name of the account.
   • AccountName and AccountUpn: Additional identifiers for the account.
   • NewValue and OldValue: The new and old values of the "Account Password Not Required" setting.

In summary, this query helps administrators track changes to the password requirement setting for accounts in Active Directory, providing details on when the change happened and which account was affected.