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title description ms.service ms.author author ms.localizationpriority manager audience ms.collection ms.topic ms.subservice ms.custom search.appverid ms.date
Start Investigation API
Use this API to start investigation on a device.
defender-endpoint
siosulli
siosulli
medium
deniseb
ITPro
m365-security
tier3
must-keep
reference
reference
api
met150
12/18/2020

Start Investigation API

[!INCLUDE Microsoft Defender XDR rebranding]

Applies to:

Want to experience Defender for Endpoint? Sign up for a free trial.

[!includeMicrosoft Defender for Endpoint API URIs for US Government]

[!includeImprove request performance]

API description

Start automated investigation on a device.

See Overview of automated investigations for more information.

Limitations

  1. Rate limitations for this API are 50 calls per hour.

Requirements for AIR

Your organization must have Defender for Endpoint (see Minimum requirements for Microsoft Defender for Endpoint.

Currently, AIR only supports the following OS versions:

  • Windows Server 2019
  • Windows Server 2022
  • Windows 10, version 1709 (OS Build 16299.1085 with KB4493441) or later
  • Windows 10, version 1803 (OS Build 17134.704 with KB4493464) or later
  • Windows 10, version 1803 or later
  • Windows 11

Permissions

One of the following permissions is required to call this API. To learn more, including how to choose permissions, see Use Microsoft Defender for Endpoint APIs

Permission type Permission Permission display name
Application Alert.ReadWrite.All 'Read and write all alerts'
Delegated (work or school account) Alert.ReadWrite 'Read and write alerts'

Note

When obtaining a token using user credentials:

  • The user needs to have at least the following role permission: 'Active remediation actions' (See Create and manage roles for more information)
  • The user needs to have access to the device, based on device group settings (See Create and manage device groups for more information)

Device group creation is supported in Defender for Endpoint Plan 1 and Plan 2.

HTTP request

POST https://api.security.microsoft.com/api/machines/{id}/startInvestigation

Request headers

Name Type Description
Authorization String Bearer {token}. Required.
Content-Type string application/json. Required.

Request body

In the request body, supply a JSON object with the following parameters:

Parameter Type Description
Comment String Comment to associate with the action. Required.

Response

If successful, this method returns 201 - Created response code and Investigation in the response body.

Example

Request

Here is an example of the request.

POST https://api.security.microsoft.com/api/machines/1e5bc9d7e413ddd7902c2932e418702b84d0cc07/startInvestigation

{
  "Comment": "Test investigation"
}

[!INCLUDE Microsoft Defender for Endpoint Tech Community]