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Reference for PreAuthenticationDiscoveryLogs table in Azure Monitor Logs.
| Attribute | Value |
|---|---|
| Category | Audit, Security |
| Basic Logs Eligible | ✓ Yes (source) |
| Supports Transformations | ✗ No (source) |
| Ingestion API Supported | ✗ No |
| Lake-Only Ingestion | ✓ Yes |
| Azure Monitor Tables Reference | View Documentation |
Source: Azure Monitor documentation
| Column Name | Type | Description |
|---|---|---|
| _BilledSize | real | The record size in bytes |
| _IsBillable | string | Specifies whether ingesting the data is billable. When _IsBillable isfalseingestion isn't billed to your Azure account |
| AADTenantId | string | The AADTenantId GUID that's associated with the logs |
| ApplicationId | string | The ID of the application. |
| CallerIpAddress | string | Provides the IP address of the caller. |
| Category | string | Category of the sign-in event. |
| CorrelationId | string | ID to provide sign-in trail. |
| ErrorNumber | string | The error number of the operation. |
| OperationName | string | For sign-ins, this value is always Sign-in activity. |
| OperationVersion | string | The REST API version that's requested by the client. |
| RequestId | string | The ID of the request. |
| RequestType | string | The type of the request. |
| ResourceGroup | string | Resource group for the logs. |
| ResultDescription | string | Provides the error description for the sign-in operation. |
| SourceSystem | string | The type of agent the event was collected by. For example,OpsManagerfor Windows agent, either direct connect or Operations Manager,Linuxfor all Linux agents, orAzurefor Azure Diagnostics |
| TenantId | string | The Log Analytics workspace ID |
| TimeGenerated | datetime | The date and time of the event in UTC. |
| Type | string | The name of the table |
| UserAgent | string | The user agent of the client. |
| UserId | string | The ID of the user. |
Official Microsoft Learn documentation for field/column information:
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