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Azure Activity Log event schema

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The Azure Activity log provides insight into any subscription-level events that occurred in Azure. This article describes Activity log categories and the schema for each.

The schema varies depending on how you access the log:

Severity Level

Each entry in the activity log has a severity level. Severity level can have one of the following values:

Severity Description
Critical Events that demand the immediate attention of a system administrator. Might indicate that an application or system failed or stopped responding.
Error Events that indicate a problem, but don't require immediate attention.
Warning Events that provide forewarning of potential problems, although not an actual error. Indicate that a resource isn't in an ideal state and may degrade later into showing errors or critical events.
Informational Events that pass noncritical information to the administrator. Similar to a note that says: "For your information".

The developers of each resource provider choose the severity levels of their resource entries. As a result, the actual severity to you can vary depending on how your application is built. For example, items that are "critical" to a particular resource taken in isolation might not be as important as "errors" in a resource type that is central to your Azure application. Be sure to consider this fact when deciding what events to alert on.

Categories

Each event in the Activity Log has a particular category that is described in the following table. See the sections below for more detail on each category and its schema when you access the Activity log from the portal, PowerShell, CLI, and REST API. The schema is different when you stream the Activity log to storage or Event Hubs. A mapping of the properties to the resource logs schema is provided in the last section of the article.

Category Description
Administrative Contains the record of all create, update, delete, and action operations performed through Resource Manager. Examples of Administrative events include create virtual machine and delete network security group.

Every action taken by a user or application using Resource Manager is modeled as an operation on a particular resource type. If the operation type is Write, Delete, or Action, the records of both the start and success or fail of that operation are recorded in the Administrative category. Administrative events also include any changes to Azure role-based access control in a subscription.
Service Health Contains the record of any service health incidents that occurred in Azure. An example of a Service Health event SQL Azure in East US is experiencing downtime.

Service Health events come in Six varieties: Action Required, Assisted Recovery, Incident, Maintenance, Information, or Security. These events are only created if you have a resource in the subscription impacted by the event.
Resource Health Contains the record of any resource health events that occurred to your Azure resources. An example of a Resource Health event is Virtual Machine health status changed to unavailable.

Resource Health events can represent one of four health statuses: Available, Unavailable, Degraded, and Unknown. Additionally, Resource Health events can be categorized as being Platform Initiated or User Initiated.
Alert Contains the record of activations for Azure alerts. An example of an Alert event is CPU % on myVM above 80 for the past 5 minutes.
Autoscale Contains the record of any events related to the operation of the autoscale engine based on any autoscale settings you defined in your subscription. An example of an Autoscale event is Autoscale scale up action failed.
Recommendation Contains recommendation events from Azure Advisor.
Security Contains the record of any alerts generated by Microsoft Defender for Cloud. An example of a Security event is Suspicious double extension file executed.
Policy Contains records of all effect action operations performed by Azure Policy. Examples of Policy events include Audit and Deny. Every action taken by Policy is modeled as an operation on a resource.

Administrative category

This category contains the record of all create, update, delete, and action operations performed through Resource Manager. Examples of the types of events you would see in this category include "create virtual machine" and "delete network security group". Every action taken by a user or application using Resource Manager is modeled as an operation on a particular resource type. If the operation type is Write, Delete, or Action, the records of both the start and success or fail of that operation are recorded in the Administrative category. The Administrative category also includes any changes to Azure role-based access control in a subscription.

Sample event

{
    "authorization": {
        "action": "Microsoft.Network/networkSecurityGroups/write",
        "scope": "/subscriptions/<subscription ID>/resourcegroups/myResourceGroup/providers/Microsoft.Network/networkSecurityGroups/myNSG"
    },
    "caller": "rob@contoso.com",
    "channels": "Operation",
    "claims": {
        "aud": "https://management.core.windows.net/",
        "iss": "https://sts.windows.net/1114444b-7467-4144-a616-e3a5d63e147b/",
        "iat": "1234567890",
        "nbf": "1234567890",
        "exp": "1234567890",
        "_claim_names": "{\"groups\":\"src1\"}",
        "_claim_sources": "{\"src1\":{\"endpoint\":\"https://graph.microsoft.com/1114444b-7467-4144-a616-e3a5d63e147b/users/f409edeb-4d29-44b5-9763-ee9348ad91bb/getMemberObjects\"}}",
        "http://schemas.microsoft.com/claims/authnclassreference": "1",
        "aio": "A3GgTJdwK4vy7Fa7l6DgJC2mI0GX44tML385OpU1Q+z+jaPnFMwB",
        "http://schemas.microsoft.com/claims/authnmethodsreferences": "rsa,mfa",
        "appid": "355249ed-15d9-460d-8481-84026b065942",
        "appidacr": "2",
        "http://schemas.microsoft.com/2012/01/devicecontext/claims/identifier": "10845a4d-ffa4-4b61-a3b4-e57b9b31cdb5",
        "e_exp": "262800",
        "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/surname": "Robertson",
        "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/givenname": "Rob",
        "ipaddr": "111.111.1.111",
        "name": "Rob Robertson",
        "http://schemas.microsoft.com/identity/claims/objectidentifier": "f409edeb-4d29-44b5-9763-ee9348ad91bb",
        "onprem_sid": "S-1-5-21-4837261184-168309720-1886587427-18514304",
        "puid": "18247BBD84827C6D",
        "http://schemas.microsoft.com/identity/claims/scope": "user_impersonation",
        "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier": "b-24Jf94A3FH2sHWVIFqO3-RSJEiv24Jnif3gj7s",
        "http://schemas.microsoft.com/identity/claims/tenantid": "1114444b-7467-4144-a616-e3a5d63e147b",
        "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name": "rob@contoso.com",
        "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/upn": "rob@contoso.com",
        "uti": "IdP3SUJGtkGlt7dDQVRPAA",
        "ver": "1.0"
    },
    "correlationId": "b5768deb-836b-41cc-803e-3f4de2f9e40b",
    "eventDataId": "d0d36f97-b29c-4cd9-9d3d-ea2b92af3e9d",
    "eventName": {
        "value": "EndRequest",
        "localizedValue": "End request"
    },
    "category": {
        "value": "Administrative",
        "localizedValue": "Administrative"
    },
    "eventTimestamp": "2018-01-29T20:42:31.3810679Z",
    "id": "/subscriptions/<subscription ID>/resourcegroups/myResourceGroup/providers/Microsoft.Network/networkSecurityGroups/myNSG/events/d0d36f97-b29c-4cd9-9d3d-ea2b92af3e9d/ticks/636528553513810679",
    "level": "Informational",
    "operationId": "04e575f8-48d0-4c43-a8b3-78c4eb01d287",
    "operationName": {
        "value": "Microsoft.Network/networkSecurityGroups/write",
        "localizedValue": "Microsoft.Network/networkSecurityGroups/write"
    },
    "resourceGroupName": "myResourceGroup",
    "resourceProviderName": {
        "value": "Microsoft.Network",
        "localizedValue": "Microsoft.Network"
    },
    "resourceType": {
        "value": "Microsoft.Network/networkSecurityGroups",
        "localizedValue": "Microsoft.Network/networkSecurityGroups"
    },
    "resourceId": "/subscriptions/<subscription ID>/resourcegroups/myResourceGroup/providers/Microsoft.Network/networkSecurityGroups/myNSG",
    "status": {
        "value": "Succeeded",
        "localizedValue": "Succeeded"
    },
    "subStatus": {
        "value": "",
        "localizedValue": ""
    },
    "submissionTimestamp": "2018-01-29T20:42:50.0724829Z",
    "subscriptionId": "<subscription ID>",
    "properties": {
        "statusCode": "Created",
        "serviceRequestId": "a4c11dbd-697e-47c5-9663-12362307157d",
        "responseBody": "",
        "requestbody": ""
    },
    "relatedEvents": []
}

Property descriptions

Element Name Description
authorization Blob of Azure RBAC properties of the event. Usually includes the “action”, “role” and “scope” properties.
caller Email address of the user who has performed the operation, UPN claim, or SPN claim based on availability.
channels One of the following values: “Admin”, “Operation”
claims The JWT token used by Active Directory to authenticate the user or application to perform this operation in Resource Manager.
correlationId Usually a GUID in the string format. Events that share a correlationId belong to the same uber action.
description Static text description of an event.
eventDataId Unique identifier of an event.
eventName Friendly name of the Administrative event.
category Always "Administrative"
httpRequest Blob describing the Http Request. Usually includes the “clientRequestId”, “clientIpAddress” and “method” (HTTP method. For example, PUT).
level Severity level of the event.
resourceGroupName Name of the resource group for the impacted resource.
resourceProviderName Name of the resource provider for the impacted resource
resourceType The type of resource affected by an Administrative event.
resourceId Resource ID of the impacted resource.
operationId A GUID shared among the events that correspond to a single operation.
operationName Name of the operation.
properties Set of <Key, Value> pairs (that is, a Dictionary) describing the details of the event.
status String describing the status of the operation. Some common values are: Started, In Progress, Succeeded, Failed, Active, Resolved.
subStatus Usually the HTTP status code of the corresponding REST call, but can also include other strings describing a subStatus, such as these common values: OK (HTTP Status Code: 200), Created (HTTP Status Code: 201), Accepted (HTTP Status Code: 202), No Content (HTTP Status Code: 204), Bad Request (HTTP Status Code: 400), Not Found (HTTP Status Code: 404), Conflict (HTTP Status Code: 409), Internal Server Error (HTTP Status Code: 500), Service Unavailable (HTTP Status Code: 503), Gateway Timeout (HTTP Status Code: 504).
eventTimestamp Timestamp when the event was generated by the Azure service processing the request corresponding the event.
submissionTimestamp Timestamp when the event became available for querying.
subscriptionId Azure Subscription ID.

Service health category

This category contains the record of any service health incidents that occurred in Azure. An example of the type of event you would see in this category is "SQL Azure in East US is experiencing downtime." Service health events come in five varieties: Action Required, Incident, Maintenance, Information, or Security, and only appear if you have a resource in the subscription that would be impacted by the event.

Sample event

{
  "channels": "Admin",
  "correlationId": "c550176b-8f52-4380-bdc5-36c1b59d3a44",
  "description": "Active: Network Infrastructure - UK South",
  "eventDataId": "c5bc4514-6642-2be3-453e-c6a67841b073",
  "eventName": {
      "value": null
  },
  "category": {
      "value": "ServiceHealth",
      "localizedValue": "Service Health"
  },
  "eventTimestamp": "2017-07-20T23:30:14.8022297Z",
  "id": "/subscriptions/<subscription ID>/events/c5bc4514-6642-2be3-453e-c6a67841b073/ticks/636361902148022297",
  "level": "Warning",
  "operationName": {
      "value": "Microsoft.ServiceHealth/incident/action",
      "localizedValue": "Microsoft.ServiceHealth/incident/action"
  },
  "resourceProviderName": {
      "value": null
  },
  "resourceType": {
      "value": null,
      "localizedValue": ""
  },
  "resourceId": "/subscriptions/<subscription ID>",
  "status": {
      "value": "Active",
      "localizedValue": "Active"
  },
  "subStatus": {
      "value": null
  },
  "submissionTimestamp": "2017-07-20T23:30:34.7431946Z",
  "subscriptionId": "<subscription ID>",
  "properties": {
    "title": "Network Infrastructure - UK South",
    "service": "Service Fabric",
    "region": "UK South",
    "communication": "Starting at approximately 21:41 UTC on 20 Jul 2017, a subset of customers in UK South may experience degraded performance, connectivity drops or timeouts when accessing their Azure resources hosted in this region. Engineers are investigating underlying Network Infrastructure issues in this region. Impacted services may include, but are not limited to App Services, Automation, Service Bus, Log Analytics, Key Vault, SQL Database, Service Fabric, Event Hubs, Stream Analytics, Azure Data Movement, API Management, and Azure Cognitive Search. Multiple engineering teams are engaged in multiple workflows to mitigate the impact. The next update will be provided in 60 minutes, or as events warrant.",
    "incidentType": "Incident",
    "trackingId": "NA0F-BJG",
    "impactStartTime": "2017-07-20T21:41:00.0000000Z",
    "impactedServices": "[{\"ImpactedRegions\":[{\"RegionName\":\"UK South\"}],\"ServiceName\":\"Service Fabric\"}]",
    "defaultLanguageTitle": "Network Infrastructure - UK South",
    "defaultLanguageContent": "Starting at approximately 21:41 UTC on 20 Jul 2017, a subset of customers in UK South may experience degraded performance, connectivity drops or timeouts when accessing their Azure resources hosted in this region. Engineers are investigating underlying Network Infrastructure issues in this region. Impacted services may include, but are not limited to App Services, Automation, Service Bus, Log Analytics, Key Vault, SQL Database, Service Fabric, Event Hubs, Stream Analytics, Azure Data Movement, API Management, and Azure Cognitive Search. Multiple engineering teams are engaged in multiple workflows to mitigate the impact. The next update will be provided in 60 minutes, or as events warrant.",
    "stage": "Active",
    "communicationId": "636361902146035247",
    "version": "0.1.1"
  }
}

Refer to the service health notifications article for documentation about the values in the properties.

Resource health category

This category contains the record of resource health events that have occurred to your Azure resources. An example of the type of event you would see in this category is "Virtual Machine health status changed to unavailable." Resource health events can represent one of four health statuses: Available, Unavailable, Degraded, and Unknown. Additionally, resource health events can be categorized as being Platform Initiated or User Initiated.

A resource health event is recorded in the activity log when:

  • An annotation, for example "ResourceDegraded" or "AccountClientThrottling", is submitted for a resource.
  • A resource transitioned to or from Unhealthy.
  • A resource was Unhealthy for more than 15 minutes.

The following resource health transitions aren't recorded in the activity log:

  • A transition to Unknown state.
  • A transition from Unknown state if:
    • This is the first transition.
    • If the state prior to Unknown is the same as the new state after. (For example, if the resource transitioned from Healthy to Unknown and back to Healthy).
    • For compute resources: VMs that transition from Healthy to Unhealthy, and back to Healthy, when the Unhealthy time is less than 35 seconds.

Sample event

{
    "channels": "Admin, Operation",
    "correlationId": "28f1bfae-56d3-7urb-bff4-194d261248e9",
    "description": "",
    "eventDataId": "a80024e1-883d-37ur-8b01-7591a1befccb",
    "eventName": {
        "value": "",
        "localizedValue": ""
    },
    "category": {
        "value": "ResourceHealth",
        "localizedValue": "Resource Health"
    },
    "eventTimestamp": "2018-09-04T15:33:43.65Z",
    "id": "/subscriptions/<subscription ID>/resourceGroups/<resource group>/providers/Microsoft.Compute/virtualMachines/<resource name>/events/a80024e1-883d-42a5-8b01-7591a1befccb/ticks/636716720236500000",
    "level": "Critical",
    "operationId": "",
    "operationName": {
        "value": "Microsoft.Resourcehealth/healthevent/Activated/action",
        "localizedValue": "Health Event Activated"
    },
    "resourceGroupName": "<resource group>",
    "resourceProviderName": {
        "value": "Microsoft.Resourcehealth/healthevent/action",
        "localizedValue": "Microsoft.Resourcehealth/healthevent/action"
    },
    "resourceType": {
        "value": "Microsoft.Compute/virtualMachines",
        "localizedValue": "Microsoft.Compute/virtualMachines"
    },
    "resourceId": "/subscriptions/<subscription ID>/resourceGroups/<resource group>/providers/Microsoft.Compute/virtualMachines/<resource name>",
    "status": {
        "value": "Active",
        "localizedValue": "Active"
    },
    "subStatus": {
        "value": "",
        "localizedValue": ""
    },
    "submissionTimestamp": "2018-09-04T15:36:24.2240867Z",
    "subscriptionId": "<subscription ID>",
    "properties": {
        "stage": "Active",
        "title": "Virtual Machine health status changed to unavailable",
        "details": "Virtual machine has experienced an unexpected event",
        "healthStatus": "Unavailable",
        "healthEventType": "Downtime",
        "healthEventCause": "PlatformInitiated",
        "healthEventCategory": "Unplanned"
    },
    "relatedEvents": []
}

Property descriptions

Element Name Description
channels Always “Admin, Operation”
correlationId A GUID in the string format.
description Static text description of the alert event.
eventDataId Unique identifier of the alert event.
category Always "ResourceHealth"
eventTimestamp Timestamp when the event was generated by the Azure service processing the request corresponding the event.
level Severity level of the event.
operationId A GUID shared among the events that correspond to a single operation.
operationName Name of the operation.
resourceGroupName Name of the resource group that contains the resource.
resourceProviderName Always "Microsoft.Resourcehealth/healthevent/action".
resourceType The type of resource affected by a Resource Health event.
resourceId Name of the resource ID for the impacted resource.
status String describing the status of the health event. Values can be: Active, Resolved, InProgress, Updated.
subStatus Usually null for alerts.
submissionTimestamp Timestamp when the event became available for querying.
subscriptionId Azure Subscription ID.
properties Set of <Key, Value> pairs (that is, a Dictionary) describing the details of the event.
properties.title A user-friendly string that describes the health status of the resource.
properties.details A user-friendly string that describes further details about the event.
properties.currentHealthStatus The current health status of the resource. One of the following values: "Available", "Unavailable", "Degraded", and "Unknown".
properties.previousHealthStatus The previous health status of the resource. One of the following values: "Available", "Unavailable", "Degraded", and "Unknown".
properties.type A description of the type of resource health event.
properties.cause A description of the cause of the resource health event. Either "UserInitiated" and "PlatformInitiated".

Alert category

This category contains the record of all activations of classic Azure alerts. An example of the type of event you would see in this category is "CPU % on myVM is over 80 for the past 5 minutes." Various Azure systems have an alerting concept: you can define a rule of some sort and receive a notification when conditions match that rule. Each time a supported Azure alert type 'activates,' or the conditions are met to generate a notification, a record of the activation is also pushed to this category of the Activity Log.

Sample event

{
  "caller": "Microsoft.Insights/alertRules",
  "channels": "Admin, Operation",
  "claims": {
    "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/spn": "Microsoft.Insights/alertRules"
  },
  "correlationId": "/subscriptions/<subscription ID>/resourceGroups/myResourceGroup/providers/microsoft.insights/alertrules/myalert/incidents/L3N1YnNjcmlwdGlvbnMvZGY2MDJjOWMtN2FhMC00MDdkLWE2ZmItZWIyMGM4YmQxMTkyL3Jlc291cmNlR3JvdXBzL0NzbUV2ZW50RE9HRk9PRC1XZXN0VVMvcHJvdmlkZXJzL21pY3Jvc29mdC5pbnNpZ2h0cy9hbGVydHJ1bGVzL215YWxlcnQwNjM2MzYyMjU4NTM1MjIxOTIw",
  "description": "'Disk read LessThan 100000 ([Count]) in the last 5 minutes' has been resolved for CloudService: myResourceGroup/Production/Event.BackgroundJobsWorker.razzle (myResourceGroup)",
  "eventDataId": "149d4baf-53dc-4cf4-9e29-17de37405cd9",
  "eventName": {
    "value": "Alert",
    "localizedValue": "Alert"
  },
  "category": {
    "value": "Alert",
    "localizedValue": "Alert"
  },
  "id": "/subscriptions/<subscription ID>/resourceGroups/myResourceGroup/providers/Microsoft.ClassicCompute/domainNames/myResourceGroup/slots/Production/roles/Event.BackgroundJobsWorker.razzle/events/149d4baf-53dc-4cf4-9e29-17de37405cd9/ticks/636362258535221920",
  "level": "Informational",
  "resourceGroupName": "myResourceGroup",
  "resourceProviderName": {
    "value": "Microsoft.ClassicCompute",
    "localizedValue": "Microsoft.ClassicCompute"
  },
  "resourceId": "/subscriptions/<subscription ID>/resourceGroups/myResourceGroup/providers/Microsoft.ClassicCompute/domainNames/myResourceGroup/slots/Production/roles/Event.BackgroundJobsWorker.razzle",
  "resourceType": {
    "value": "Microsoft.ClassicCompute/domainNames/slots/roles",
    "localizedValue": "Microsoft.ClassicCompute/domainNames/slots/roles"
  },
  "operationId": "/subscriptions/<subscription ID>/resourceGroups/myResourceGroup/providers/microsoft.insights/alertrules/myalert/incidents/L3N1YnNjcmlwdGlvbnMvZGY2MDJjOWMtN2FhMC00MDdkLWE2ZmItZWIyMGM4YmQxMTkyL3Jlc291cmNlR3JvdXBzL0NzbUV2ZW50RE9HRk9PRC1XZXN0VVMvcHJvdmlkZXJzL21pY3Jvc29mdC5pbnNpZ2h0cy9hbGVydHJ1bGVzL215YWxlcnQwNjM2MzYyMjU4NTM1MjIxOTIw",
  "operationName": {
    "value": "Microsoft.Insights/AlertRules/Resolved/Action",
    "localizedValue": "Microsoft.Insights/AlertRules/Resolved/Action"
  },
  "properties": {
    "RuleUri": "/subscriptions/<subscription ID>/resourceGroups/myResourceGroup/providers/microsoft.insights/alertrules/myalert",
    "RuleName": "myalert",
    "RuleDescription": "",
    "Threshold": "100000",
    "WindowSizeInMinutes": "5",
    "Aggregation": "Average",
    "Operator": "LessThan",
    "MetricName": "Disk read",
    "MetricUnit": "Count"
  },
  "status": {
    "value": "Resolved",
    "localizedValue": "Resolved"
  },
  "subStatus": {
    "value": null
  },
  "eventTimestamp": "2017-07-21T09:24:13.522192Z",
  "submissionTimestamp": "2017-07-21T09:24:15.6578651Z",
  "subscriptionId": "<subscription ID>"
}

Property descriptions

Element Name Description
caller Always Microsoft.Insights/alertRules
channels Always “Admin, Operation”
claims JSON blob with the SPN (service principal name), or resource type, of the alert engine.
correlationId A GUID in the string format.
description Static text description of the alert event.
eventDataId Unique identifier of the alert event.
category Always "Alert"
level Severity level of the event.
resourceGroupName Name of the resource group for the impacted resource if it's a metric alert. For other alert types, it's the name of the resource group that contains the alert itself.
resourceProviderName Name of the resource provider for the impacted resource if it's a metric alert. For other alert types, it's the name of the resource provider for the alert itself.
resourceId Name of the resource ID for the impacted resource if it's a metric alert. For other alert types, it's the resource ID of the alert resource itself.
operationId A GUID shared among the events that correspond to a single operation.
operationName Name of the operation.
properties Set of <Key, Value> pairs (that is, a Dictionary) describing the details of the event.
status String describing the status of the operation. Some common values are: Started, In Progress, Succeeded, Failed, Active, Resolved.
subStatus Usually null for alerts.
eventTimestamp Timestamp when the event was generated by the Azure service processing the request corresponding the event.
submissionTimestamp Timestamp when the event became available for querying.
subscriptionId Azure Subscription ID.

Properties field per alert type

The properties field will contain different values depending on the source of the alert event. Two common alert event providers are Activity Log alerts and metric alerts.

Properties for Activity Log alerts

Element Name Description
properties.subscriptionId The subscription ID from the activity log event that caused this activity log alert rule to be activated.
properties.eventDataId The event data ID from the activity log event that caused this activity log alert rule to be activated.
properties.resourceGroup The resource group from the activity log event that caused this activity log alert rule to be activated.
properties.resourceId The resource ID from the activity log event that caused this activity log alert rule to be activated.
properties.eventTimestamp The event timestamp of the activity log event that caused this activity log alert rule to be activated.
properties.operationName The operation name from the activity log event that caused this activity log alert rule to be activated.
properties.status The status from the activity log event that caused this activity log alert rule to be activated.

Properties for metric alerts

Element Name Description
properties.RuleUri Resource ID of the metric alert rule itself.
properties.RuleName The name of the metric alert rule.
properties.RuleDescription The description of the metric alert rule (as defined in the alert rule).
properties.Threshold The threshold value used in the evaluation of the metric alert rule.
properties.WindowSizeInMinutes The window size used in the evaluation of the metric alert rule.
properties.Aggregation The aggregation type defined in the metric alert rule.
properties.Operator The conditional operator used in the evaluation of the metric alert rule.
properties.MetricName The metric name of the metric used in the evaluation of the metric alert rule.
properties.MetricUnit The metric unit for the metric used in the evaluation of the metric alert rule.

Autoscale category

This category contains the record of any events related to the operation of the autoscale engine based on any autoscale settings you have defined in your subscription. An example of the type of event you would see in this category is "Autoscale scale up action failed." Using autoscale, you can automatically scale out or scale in the number of instances in a supported resource type based on time of day and/or load (metric) data using an autoscale setting. When the conditions are met to scale up or down, the start and succeeded or failed events are recorded in this category.

Sample event

{
  "caller": "Microsoft.Insights/autoscaleSettings",
  "channels": "Admin, Operation",
  "claims": {
    "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/spn": "Microsoft.Insights/autoscaleSettings"
  },
  "correlationId": "fc6a7ff5-ff68-4bb7-81b4-3629212d03d0",
  "description": "The autoscale engine attempting to scale resource '/subscriptions/<subscription ID>/resourceGroups/myResourceGroup/providers/Microsoft.ClassicCompute/domainNames/myResourceGroup/slots/Production/roles/myResource' from 3 instances count to 2 instances count.",
  "eventDataId": "a5b92075-1de9-42f1-b52e-6f3e4945a7c7",
  "eventName": {
    "value": "AutoscaleAction",
    "localizedValue": "AutoscaleAction"
  },
  "category": {
    "value": "Autoscale",
    "localizedValue": "Autoscale"
  },
  "id": "/subscriptions/<subscription ID>/resourceGroups/myResourceGroup/providers/microsoft.insights/autoscalesettings/myResourceGroup-Production-myResource-myResourceGroup/events/a5b92075-1de9-42f1-b52e-6f3e4945a7c7/ticks/636361956518681572",
  "level": "Informational",
  "resourceGroupName": "myResourceGroup",
  "resourceProviderName": {
    "value": "microsoft.insights",
    "localizedValue": "microsoft.insights"
  },
  "resourceId": "/subscriptions/<subscription ID>/resourceGroups/myResourceGroup/providers/microsoft.insights/autoscalesettings/myResourceGroup-Production-myResource-myResourceGroup",
  "resourceType": {
    "value": "microsoft.insights/autoscalesettings",
    "localizedValue": "microsoft.insights/autoscalesettings"
  },
  "operationId": "fc6a7ff5-ff68-4bb7-81b4-3629212d03d0",
  "operationName": {
    "value": "Microsoft.Insights/AutoscaleSettings/Scaledown/Action",
    "localizedValue": "Microsoft.Insights/AutoscaleSettings/Scaledown/Action"
  },
  "properties": {
    "Description": "The autoscale engine attempting to scale resource '/subscriptions/<subscription ID>/resourceGroups/myResourceGroup/providers/Microsoft.ClassicCompute/domainNames/myResourceGroup/slots/Production/roles/myResource' from 3 instances count to 2 instances count.",
    "ResourceName": "/subscriptions/<subscription ID>/resourceGroups/myResourceGroup/providers/Microsoft.ClassicCompute/domainNames/myResourceGroup/slots/Production/roles/myResource",
    "OldInstancesCount": "3",
    "NewInstancesCount": "2",
    "LastScaleActionTime": "Fri, 21 Jul 2017 01:00:51 GMT"
  },
  "status": {
    "value": "Succeeded",
    "localizedValue": "Succeeded"
  },
  "subStatus": {
    "value": null
  },
  "eventTimestamp": "2017-07-21T01:00:51.8681572Z",
  "submissionTimestamp": "2017-07-21T01:00:52.3008754Z",
  "subscriptionId": "<subscription ID>"
}

Property descriptions

Element Name Description
caller Always Microsoft.Insights/autoscaleSettings
channels Always “Admin, Operation”
claims JSON blob with the SPN (service principal name), or resource type, of the autoscale engine.
correlationId A GUID in the string format.
description Static text description of the autoscale event.
eventDataId Unique identifier of the autoscale event.
level Severity level of the event.
resourceGroupName Name of the resource group for the autoscale setting.
resourceProviderName Name of the resource provider for the autoscale setting.
resourceId Resource ID of the autoscale setting.
operationId A GUID shared among the events that correspond to a single operation.
operationName Name of the operation.
properties Set of <Key, Value> pairs (that is, a Dictionary) describing the details of the event.
properties.Description Detailed description of what the autoscale engine was doing.
properties.ResourceName Resource ID of the impacted resource (the resource on which the scale action was being performed)
properties.OldInstancesCount The number of instances before the autoscale action took effect.
properties.NewInstancesCount The number of instances after the autoscale action took effect.
properties.LastScaleActionTime The timestamp of when the autoscale action occurred.
status String describing the status of the operation. Some common values are: Started, In Progress, Succeeded, Failed, Active, Resolved.
subStatus Usually null for autoscale.
eventTimestamp Timestamp when the event was generated by the Azure service processing the request corresponding the event.
submissionTimestamp Timestamp when the event became available for querying.
subscriptionId Azure Subscription ID.

Security category

This category contains the record any alerts generated by Microsoft Defender for Cloud. An example of the type of event you would see in this category is "Suspicious double extension file executed."

Sample event

{
    "channels": "Operation",
    "correlationId": "965d6c6a-a790-4a7e-8e9a-41771b3fbc38",
    "description": "Suspicious double extension file executed. Machine logs indicate an execution of a process with a suspicious double extension.\r\nThis extension may trick users into thinking files are safe to be opened and might indicate the presence of malware on the system.",
    "eventDataId": "965d6c6a-a790-4a7e-8e9a-41771b3fbc38",
    "eventName": {
        "value": "Suspicious double extension file executed",
        "localizedValue": "Suspicious double extension file executed"
    },
    "category": {
        "value": "Security",
        "localizedValue": "Security"
    },
    "eventTimestamp": "2017-10-18T06:02:18.6179339Z",
    "id": "/subscriptions/<subscription ID>/providers/Microsoft.Security/locations/centralus/alerts/965d6c6a-a790-4a7e-8e9a-41771b3fbc38/events/965d6c6a-a790-4a7e-8e9a-41771b3fbc38/ticks/636439033386179339",
    "level": "Informational",
    "operationId": "965d6c6a-a790-4a7e-8e9a-41771b3fbc38",
    "operationName": {
        "value": "Microsoft.Security/locations/alerts/activate/action",
        "localizedValue": "Microsoft.Security/locations/alerts/activate/action"
    },
    "resourceGroupName": "myResourceGroup",
    "resourceProviderName": {
        "value": "Microsoft.Security",
        "localizedValue": "Microsoft.Security"
    },
    "resourceType": {
        "value": "Microsoft.Security/locations/alerts",
        "localizedValue": "Microsoft.Security/locations/alerts"
    },
    "resourceId": "/subscriptions/<subscription ID>/providers/Microsoft.Security/locations/centralus/alerts/2518939942613820660_a48f8653-3fc6-4166-9f19-914f030a13d3",
    "status": {
        "value": "Active",
        "localizedValue": "Active"
    },
    "subStatus": {
        "value": null
    },
    "submissionTimestamp": "2017-10-18T06:02:52.2176969Z",
    "subscriptionId": "<subscription ID>",
    "properties": {
        "accountLogonId": "0x2r4",
        "commandLine": "c:\\mydirectory\\doubleetension.pdf.exe",
        "domainName": "hpc",
        "parentProcess": "unknown",
        "parentProcess id": "0",
        "processId": "6988",
        "processName": "c:\\mydirectory\\doubleetension.pdf.exe",
        "userName": "myUser",
        "UserSID": "S-3-2-12",
        "ActionTaken": "Detected",
        "Severity": "High"
    },
    "relatedEvents": []
}

Property descriptions

Element Name Description
channels Always “Operation”
correlationId A GUID in the string format.
description Static text description of the security event.
eventDataId Unique identifier of the security event.
eventName Friendly name of the security event.
category Always "Security"
ID Unique resource identifier of the security event.
level Severity level of the event.
resourceGroupName Name of the resource group for the resource.
resourceProviderName Name of the resource provider for Microsoft Defender for Cloud. Always "Microsoft.Security".
resourceType The type of resource that generated the security event, such as "Microsoft.Security/locations/alerts"
resourceId Resource ID of the security alert.
operationId A GUID shared among the events that correspond to a single operation.
operationName Name of the operation.
properties Set of <Key, Value> pairs (that is, a Dictionary) describing the details of the event. These properties vary depending on the type of security alert. See this page for a description of the types of alerts that come from Defender for Cloud.
properties.Severity The severity level. Possible values are "High," "Medium," or "Low."
status String describing the status of the operation. Some common values are: Started, In Progress, Succeeded, Failed, Active, Resolved.
subStatus Usually null for security events.
eventTimestamp Timestamp when the event was generated by the Azure service processing the request corresponding the event.
submissionTimestamp Timestamp when the event became available for querying.
subscriptionId Azure Subscription ID.

Recommendation category

This category contains the record of any new recommendations that are generated for your services. An example of a recommendation would be "Use availability sets for improved fault tolerance." There are four types of Recommendation events that can be generated: High Availability, Performance, Security, and Cost Optimization.

Sample event

{
    "channels": "Operation",
    "correlationId": "92481dfd-c5bf-4752-b0d6-0ecddaa64776",
    "description": "The action was successful.",
    "eventDataId": "06cb0e44-111b-47c7-a4f2-aa3ee320c9c5",
    "eventName": {
        "value": "",
        "localizedValue": ""
    },
    "category": {
        "value": "Recommendation",
        "localizedValue": "Recommendation"
    },
    "eventTimestamp": "2018-06-07T21:30:42.976919Z",
    "id": "/SUBSCRIPTIONS/<Subscription ID>/RESOURCEGROUPS/MYRESOURCEGROUP/PROVIDERS/MICROSOFT.COMPUTE/VIRTUALMACHINES/MYVM/events/06cb0e44-111b-47c7-a4f2-aa3ee320c9c5/ticks/636640038429769190",
    "level": "Informational",
    "operationId": "",
    "operationName": {
        "value": "Microsoft.Advisor/generateRecommendations/action",
        "localizedValue": "Microsoft.Advisor/generateRecommendations/action"
    },
    "resourceGroupName": "MYRESOURCEGROUP",
    "resourceProviderName": {
        "value": "MICROSOFT.COMPUTE",
        "localizedValue": "MICROSOFT.COMPUTE"
    },
    "resourceType": {
        "value": "MICROSOFT.COMPUTE/virtualmachines",
        "localizedValue": "MICROSOFT.COMPUTE/virtualmachines"
    },
    "resourceId": "/SUBSCRIPTIONS/<Subscription ID>/RESOURCEGROUPS/MYRESOURCEGROUP/PROVIDERS/MICROSOFT.COMPUTE/VIRTUALMACHINES/MYVM",
    "status": {
        "value": "Active",
        "localizedValue": "Active"
    },
    "subStatus": {
        "value": "",
        "localizedValue": ""
    },
    "submissionTimestamp": "2018-06-07T21:30:42.976919Z",
    "subscriptionId": "<Subscription ID>",
    "properties": {
        "recommendationSchemaVersion": "1.0",
        "recommendationCategory": "Security",
        "recommendationImpact": "High",
        "recommendationRisk": "None"
    },
    "relatedEvents": []
}

Property descriptions

Element Name Description
channels Always “Operation”
correlationId A GUID in the string format.
description Static text description of the recommendation event
eventDataId Unique identifier of the recommendation event.
category Always "Recommendation"
ID Unique resource identifier of the recommendation event.
level Severity level of the event.
operationName Name of the operation. Always "Microsoft.Advisor/generateRecommendations/action"
resourceGroupName Name of the resource group for the resource.
resourceProviderName Name of the resource provider for the resource that this recommendation applies to, such as "MICROSOFT.COMPUTE"
resourceType Name of the resource type for the resource that this recommendation applies to, such as "MICROSOFT.COMPUTE/virtualmachines"
resourceId Resource ID of the resource that the recommendation applies to
status Always "Active"
submissionTimestamp Timestamp when the event became available for querying.
subscriptionId Azure Subscription ID.
properties Set of <Key, Value> pairs (that is, a Dictionary) describing the details of the recommendation.
properties.recommendationSchemaVersion Schema version of the recommendation properties published in the Activity Log entry
properties.recommendationCategory Category of the recommendation. Possible values are "High Availability", "Performance", "Security", and "Cost"
properties.recommendationImpact Impact of the recommendation. Possible values are "High", "Medium", "Low"
properties.recommendationRisk Risk of the recommendation. Possible values are "Error", "Warning", "None"

Policy category

This category contains records of all effect action operations performed by Azure Policy. Examples of the types of events you would see in this category include Audit and Deny. Every action taken by Policy is modeled as an operation on a resource.

Sample Policy event

{
    "authorization": {
        "action": "Microsoft.Resources/checkPolicyCompliance/read",
        "scope": "/subscriptions/<subscriptionID>"
    },
    "caller": "33a68b9d-63ce-484c-a97e-94aef4c89648",
    "channels": "Operation",
    "claims": {
        "aud": "https://management.azure.com/",
        "iss": "https://sts.windows.net/1114444b-7467-4144-a616-e3a5d63e147b/",
        "iat": "1234567890",
        "nbf": "1234567890",
        "exp": "1234567890",
        "aio": "A3GgTJdwK4vy7Fa7l6DgJC2mI0GX44tML385OpU1Q+z+jaPnFMwB",
        "appid": "1d78a85d-813d-46f0-b496-dd72f50a3ec0",
        "appidacr": "2",
        "http://schemas.microsoft.com/identity/claims/identityprovider": "https://sts.windows.net/1114444b-7467-4144-a616-e3a5d63e147b/",
        "http://schemas.microsoft.com/identity/claims/objectidentifier": "f409edeb-4d29-44b5-9763-ee9348ad91bb",
        "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier": "b-24Jf94A3FH2sHWVIFqO3-RSJEiv24Jnif3gj7s",
        "http://schemas.microsoft.com/identity/claims/tenantid": "1114444b-7467-4144-a616-e3a5d63e147b",
        "uti": "IdP3SUJGtkGlt7dDQVRPAA",
        "ver": "1.0"
    },
    "correlationId": "b5768deb-836b-41cc-803e-3f4de2f9e40b",
    "description": "",
    "eventDataId": "d0d36f97-b29c-4cd9-9d3d-ea2b92af3e9d",
    "eventName": {
        "value": "EndRequest",
        "localizedValue": "End request"
    },
    "category": {
        "value": "Policy",
        "localizedValue": "Policy"
    },
    "eventTimestamp": "2019-01-15T13:19:56.1227642Z",
    "id": "/subscriptions/<subscriptionID>/resourceGroups/myResourceGroup/providers/Microsoft.Sql/servers/contososqlpolicy/events/13bbf75f-36d5-4e66-b693-725267ff21ce/ticks/636831551961227642",
    "level": "Warning",
    "operationId": "04e575f8-48d0-4c43-a8b3-78c4eb01d287",
    "operationName": {
        "value": "Microsoft.Authorization/policies/audit/action",
        "localizedValue": "Microsoft.Authorization/policies/audit/action"
    },
    "resourceGroupName": "myResourceGroup",
    "resourceProviderName": {
        "value": "Microsoft.Sql",
        "localizedValue": "Microsoft SQL"
    },
    "resourceType": {
        "value": "Microsoft.Resources/checkPolicyCompliance",
        "localizedValue": "Microsoft.Resources/checkPolicyCompliance"
    },
    "resourceId": "/subscriptions/<subscriptionID>/resourceGroups/myResourceGroup/providers/Microsoft.Sql/servers/contososqlpolicy",
    "status": {
        "value": "Succeeded",
        "localizedValue": "Succeeded"
    },
    "subStatus": {
        "value": "",
        "localizedValue": ""
    },
    "submissionTimestamp": "2019-01-15T13:20:17.1077672Z",
    "subscriptionId": "<subscriptionID>",
    "properties": {
        "isComplianceCheck": "True",
        "resourceLocation": "westus2",
        "ancestors": "72f988bf-86f1-41af-91ab-2d7cd011db47",
        "policies": "[{\"policyDefinitionId\":\"/subscriptions/<subscriptionID>/providers/Microsoft.
            Authorization/policyDefinitions/5775cdd5-d3d3-47bf-bc55-bb8b61746506/\",\"policyDefiniti
            onName\":\"5775cdd5-d3d3-47bf-bc55-bb8b61746506\",\"policyDefinitionEffect\":\"Deny\",\"
            policyAssignmentId\":\"/subscriptions/<subscriptionID>/providers/Microsoft.Authorization
            /policyAssignments/991a69402a6c484cb0f9b673/\",\"policyAssignmentName\":\"991a69402a6c48
            4cb0f9b673\",\"policyAssignmentScope\":\"/subscriptions/<subscriptionID>\",\"policyAssig
            nmentParameters\":{}}]"
    },
    "relatedEvents": []
}

Policy event property descriptions

Element Name Description
authorization Array of Azure RBAC properties of the event. For new resources, this is the action and scope of the request that triggered evaluation. For existing resources, the action is "Microsoft.Resources/checkPolicyCompliance/read".
caller For new resources, the identity that initiated a deployment. For existing resources, the GUID of the Microsoft Azure Policy Insights RP.
channels Policy events use only the "Operation" channel.
claims The JWT token used by Active Directory to authenticate the user or application to perform this operation in Resource Manager.
correlationId Usually a GUID in the string format. Events that share a correlationId belong to the same uber action.
description This field is blank for Policy events.
eventDataId Unique identifier of an event.
eventName Either "BeginRequest" or "EndRequest". "BeginRequest" is used for delayed auditIfNotExists and deployIfNotExists evaluations and when a deployIfNotExists effect starts a template deployment. All other operations return "EndRequest".
category Declares the activity log event as belonging to "Policy".
eventTimestamp Timestamp when the event was generated by the Azure service processing the request corresponding the event.
ID Unique identifier of the event on the specific resource.
level Severity level of the event. Audit uses "Warning" and Deny uses "Error". An auditIfNotExists or deployIfNotExists error can generate "Warning" or "Error" depending on severity. All other Policy events use "Informational".
operationId A GUID shared among the events that correspond to a single operation.
operationName Name of the operation and directly correlates to the Policy effect.
resourceGroupName Name of the resource group for the evaluated resource.
resourceProviderName Name of the resource provider for the evaluated resource.
resourceType For new resources, it's the type being evaluated. For existing resources, returns "Microsoft.Resources/checkPolicyCompliance".
resourceId Resource ID of the evaluated resource.
status String describing the status of the Policy evaluation result. Most Policy evaluations return "Succeeded", but a Deny effect returns "Failed". Errors in auditIfNotExists or deployIfNotExists also return "Failed".
subStatus Field is blank for Policy events.
submissionTimestamp Timestamp when the event became available for querying.
subscriptionId Azure Subscription ID.
properties.isComplianceCheck Returns "False" when a new resource is deployed or an existing resource's Resource Manager properties are updated. All other evaluation triggers result in "True".
properties.resourceLocation The Azure region of the resource being evaluated.
properties.ancestors A comma-separated list of parent management groups ordered from direct parent to farthest grandparent.
properties.policies Includes details about the policy definition, assignment, effect, and parameters that this Policy evaluation is a result of.
relatedEvents This field is blank for Policy events.

Schema from storage account and event hubs

When streaming the Azure Activity log to a storage account or event hub, the data follows the resource log schema. The table below provides a mapping of properties from the above schemas to the resource logs schema.

Important

The format of Activity log data written to a storage account changed to JSON Lines on Nov. 1st, 2018. See Prepare for format change to Azure Monitor resource logs archived to a storage account for details on this format change.

Resource logs schema property Activity Log REST API schema property Notes
time eventTimestamp
resourceId resourceId subscriptionId, resourceType, resourceGroupName are all inferred from the resourceId.
operationName operationName.value
category Part of operation name Always "Administrative"
resultType status.value
resultSignature substatus.value
resultDescription description
durationMs N/A Always 0
callerIpAddress httpRequest.clientIpAddress
correlationId correlationId
identity claims and authorization properties
Level Level
location N/A Location of where the event was processed. This isn't the location of the resource, but rather where the event was processed. This property will be removed in a future update.
Properties properties.eventProperties
properties.eventCategory category If properties.eventCategory isn't present, category is "Administrative"
properties.eventName eventName
properties.operationId operationId
properties.eventProperties properties

Following is an example of an event using this schema:

{
    "records": [
        {
            "time": "2019-01-21T22:14:26.9792776Z",
            "resourceId": "/subscriptions/s1/resourceGroups/MSSupportGroup/providers/microsoft.support/supporttickets/123456112305841",
            "operationName": "microsoft.support/supporttickets/write",
            "category": "Write",
            "resultType": "Success",
            "resultSignature": "Succeeded.Created",
            "durationMs": 2826,
            "callerIpAddress": "111.111.111.11",
            "correlationId": "c776f9f4-36e5-4e0e-809b-c9b3c3fb62a8",
            "identity": {
               "authorization": {
                   "scope": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/rg-001/providers/Microsoft.Storage/storageAccounts/       msftstorageaccount",
                   "action": "Microsoft.Storage/storageAccounts/listAccountSas/action",
                   "evidence": {
                       "role": "Azure Eventhubs Service Role",
                       "roleAssignmentScope": "/subscriptions/00000000-0000-0000-0000-000000000000",
                       "roleAssignmentId": "123abc2a6c314b0ab03a891259123abc",
                       "roleDefinitionId": "123456789de042a6a64b29b123456789",
                       "principalId": "abcdef038c6444c18f1c31311fabcdef",
                       "principalType": "ServicePrincipal"
                   }
               },
                "claims": {
                    "aud": "https://management.core.windows.net/",
                    "iss": "https://sts.windows.net/abcde123-86f1-41af-91ab-abcde1234567/",
                    "iat": "1421876371",
                    "nbf": "1421876371",
                    "exp": "1421880271",
                    "ver": "1.0",
                    "http://schemas.microsoft.com/identity/claims/tenantid": "00000000-0000-0000-0000-000000000000",
                    "http://schemas.microsoft.com/claims/authnmethodsreferences": "pwd",
                    "http://schemas.microsoft.com/identity/claims/objectidentifier": "123abc45-8211-44e3-95xq-85137af64708",
                    "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/upn": "admin@contoso.com",
                    "puid": "20030000801A118C",
                    "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier": "9876543210DKk1YzIY8k0t1_EAPaXoeHyPRn6f413zM",
                    "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/givenname": "John",
                    "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/surname": "Smith",
                    "name": "John Smith",
                    "groups": "12345678-cacfe77c-e058-4712-83qw-f9b08849fd60,12345678-4c41-4b23-99d2-d32ce7aa621c,12345678-0578-4ea0-9gdc-e66cc564d18c",
                    "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name": " admin@contoso.com",
                    "appid": "12345678-3bq0-49c1-b47d-974e53cbdf3c",
                    "appidacr": "2",
                    "http://schemas.microsoft.com/identity/claims/scope": "user_impersonation",
                    "http://schemas.microsoft.com/claims/authnclassreference": "1"
                }
            },
            "level": "Information",
            "location": "global",
            "properties": {
                "statusCode": "Created",
                "serviceRequestId": "12345678-8ca0-47ad-9b80-6cde2207f97c"
            }
        }
    ]
}

Next steps