KQL Search

This query is combining data from multiple log sources related to sign-ins. Specifically, it is merging data from:

1. SigninLogs - Logs of user sign-ins.
2. AADNonInteractiveUserSignInLogs - Logs of non-interactive user sign-ins, which typically occur when a service or application accesses resources on behalf of a user without direct user interaction.
3. ADFSSignInLogs - Logs of sign-ins through Active Directory Federation Services (ADFS), which is used for single sign-on.
4. AADServicePrincipalSignInLogs - Logs of sign-ins by service principals, which are identities used by applications or services to access resources.
5. AADManagedIdentitySignInLogs - Logs of sign-ins by managed identities, which are identities automatically managed by Azure for applications running in Azure.

The union isfuzzy=true part of the query means that the union operation is being performed in a way that allows for some flexibility in matching the schema of the different tables. This can be useful if the tables have slightly different structures or fields. In simple terms, this query is gathering and combining all sign-in related logs from these different sources into a single dataset for analysis.