Inference Pools - Update

Service:: Machine Learning

API Version:: 2026-03-15-preview

Update InferencePool (asynchronous).

PATCH https://management.azure.com/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.MachineLearningServices/workspaces/{workspaceName}/inferencePools/{inferencePoolName}?api-version=2026-03-15-preview

URI Parameters

Name	In	Required	Type	Description
inferencePoolName	path	True	string pattern: ^[a-zA-Z0-9][a-zA-Z0-9\-_]{0,254}$	Name of InferencePool
resourceGroupName	path	True	string minLength: 1 maxLength: 90	The name of the resource group. The name is case insensitive.
subscriptionId	path	True	string minLength: 1	The ID of the target subscription.
workspaceName	path	True	string pattern: ^[a-zA-Z0-9][a-zA-Z0-9_-]{2,32}$	Azure Machine Learning Workspace Name
api-version	query	True	string minLength: 1	The API version to use for this operation.

Request Body

Name	Type	Description
identity	PartialManagedServiceIdentity	Managed service identity (system assigned and/or user assigned identities)
sku	PartialSku	Sku details required for ARM contract for Autoscaling.
tags	object	Resource tags.

Responses

Name	Type	Description
200 OK	InferencePool	The request has succeeded.
202 Accepted		The request has been accepted for processing, but processing has not yet completed. Headers Location: string Retry-After: integer x-ms-async-operation-timeout: string
Other Status Codes	ErrorResponse	An unexpected error response.

Name

Type

Description

200 OK

InferencePool

The request has succeeded.

202 Accepted

The request has been accepted for processing, but processing has not yet completed.

Headers

Location: string
Retry-After: integer
x-ms-async-operation-timeout: string

Other Status Codes

ErrorResponse

An unexpected error response.

Security

azure_auth

Azure Active Directory OAuth2 Flow.

Type: oauth2
Flow: implicit
Authorization URL: https://login.microsoftonline.com/common/oauth2/authorize

Scopes

Name	Description
user_impersonation	impersonate your user account

Examples

Update Workspace Inference Pool.

Sample request

HTTP

PATCH https://management.azure.com/subscriptions/00000000-1111-2222-3333-444444444444/resourceGroups/test-rg/providers/Microsoft.MachineLearningServices/workspaces/my-aml-workspace/inferencePools/string?api-version=2026-03-15-preview

{
  "identity": {
    "type": "UserAssigned",
    "userAssignedIdentities": {
      "string": {}
    }
  },
  "sku": {
    "name": "string",
    "capacity": 1,
    "family": "string",
    "size": "string",
    "tier": "Standard"
  },
  "tags": {}
}

Sample response

Status code:: 200

{
  "name": "string",
  "type": "string",
  "id": "string",
  "identity": {
    "type": "SystemAssigned",
    "principalId": "00000000-1111-2222-3333-444444444444",
    "tenantId": "00000000-1111-2222-3333-444444444444",
    "userAssignedIdentities": {
      "string": {
        "clientId": "00000000-1111-2222-3333-444444444444",
        "principalId": "00000000-1111-2222-3333-444444444444"
      }
    }
  },
  "kind": "string",
  "location": "string",
  "properties": {
    "description": "string",
    "properties": [
      {
        "key": "string",
        "value": "string"
      }
    ],
    "provisioningState": "Canceled",
    "scaleUnitConfiguration": {
      "disablePublicEgress": false,
      "registries": [
        "string",
        "registryName1"
      ]
    }
  },
  "sku": {
    "name": "string",
    "capacity": 1,
    "family": "string",
    "size": "string",
    "tier": "Standard"
  },
  "systemData": {
    "createdAt": "2020-01-01T12:34:56.999+00:22",
    "createdBy": "string",
    "createdByType": "User",
    "lastModifiedAt": "2020-01-01T12:34:56.999+00:22",
    "lastModifiedBy": "string",
    "lastModifiedByType": "User"
  },
  "tags": {}
}

Status code:: 202

location: https://management.azure.com/subscriptions/34adfa4f-cedf-4dc0-ba29-b6d1a69ab345/resourceGroups/testrg123/providers/Microsoft.MachineLearningServices/locations/centraluseuap/mfeOperationResults/prefix:F0C6B8EC-0D53-432C-913B-1CD9E8CDE3A0

Definitions

Name	Description
createdByType	The type of identity that created the resource.
ErrorAdditionalInfo	The resource management error additional info.
ErrorDetail	The error detail.
ErrorResponse	Error response
InferencePool	InferencePool is a preview-only resource.
InferencePoolProperties	Inference pool configuration
ManagedServiceIdentity	Managed service identity (system assigned and/or user assigned identities)
ManagedServiceIdentityType	Type of managed service identity (where both SystemAssigned and UserAssigned types are allowed).
PartialManagedServiceIdentity	Managed service identity (system assigned and/or user assigned identities)
PartialMinimalTrackedResourceWithSkuAndIdentity	Strictly used in update requests.
PartialSku	Common SKU definition.
PoolProvisioningState	State of pool related resources provisioning.
ScaleUnitConfiguration	Configuration for ScaleUnit pool.
Sku	The resource model definition representing SKU
SkuTier	This field is required to be implemented by the Resource Provider if the service has more than one tier, but is not required on a PUT.
StringStringKeyValuePair
systemData	Metadata pertaining to creation and last modification of the resource.
UserAssignedIdentity	User assigned identity properties

createdByType

Enumeration

The type of identity that created the resource.

Value	Description
User
Application
ManagedIdentity
Key

ErrorAdditionalInfo

Object

The resource management error additional info.

Name	Type	Description
info	object	The additional info.
type	string	The additional info type.

ErrorDetail

Object

The error detail.

Name	Type	Description
additionalInfo	ErrorAdditionalInfo[]	The error additional info.
code	string	The error code.
details	ErrorDetail[]	The error details.
message	string	The error message.
target	string	The error target.

ErrorResponse

Object

Error response

Name	Type	Description
error	ErrorDetail	The error object.

InferencePool

Object

InferencePool is a preview-only resource.

Name	Type	Description
id	string	Fully qualified resource ID for the resource. Ex - /subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/{resourceProviderNamespace}/{resourceType}/{resourceName}
identity	ManagedServiceIdentity	Managed service identity (system assigned and/or user assigned identities)
kind	string	Metadata used by portal/tooling/etc to render different UX experiences for resources of the same type.
location	string	The geo-location where the resource lives
name	string	The name of the resource
properties	InferencePoolProperties	[Required] Additional attributes of the entity.
sku	Sku	Sku details required for ARM contract for Autoscaling.
systemData	systemData	Azure Resource Manager metadata containing createdBy and modifiedBy information.
tags	object	Resource tags.
type	string	The type of the resource. E.g. "Microsoft.Compute/virtualMachines" or "Microsoft.Storage/storageAccounts"

InferencePoolProperties

Object

Inference pool configuration

Name	Type	Description
description	string	Description of the resource.
properties	StringStringKeyValuePair[]	Property dictionary. Properties can be added, but not removed or altered.
provisioningState	PoolProvisioningState	Provisioning state for the pool.
scaleUnitConfiguration	ScaleUnitConfiguration	Gets or sets ScaleUnitConfiguration for the inference pool. Used if PoolType=ScaleUnit.

ManagedServiceIdentity

Object

Managed service identity (system assigned and/or user assigned identities)

Name	Type	Description
principalId	string (uuid)	The service principal ID of the system assigned identity. This property will only be provided for a system assigned identity.
tenantId	string (uuid)	The tenant ID of the system assigned identity. This property will only be provided for a system assigned identity.
type	ManagedServiceIdentityType	Type of managed service identity (where both SystemAssigned and UserAssigned types are allowed).
userAssignedIdentities	<string, UserAssignedIdentity>	User-Assigned Identities The set of user assigned identities associated with the resource. The userAssignedIdentities dictionary keys will be ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}. The dictionary values can be empty objects ({}) in requests.

ManagedServiceIdentityType

Enumeration

Type of managed service identity (where both SystemAssigned and UserAssigned types are allowed).

Value	Description
None
SystemAssigned
UserAssigned
SystemAssigned,UserAssigned

PartialManagedServiceIdentity

Object

Managed service identity (system assigned and/or user assigned identities)

Name	Type	Description
type	ManagedServiceIdentityType	Managed service identity (system assigned and/or user assigned identities)
userAssignedIdentities		The set of user assigned identities associated with the resource. The userAssignedIdentities dictionary keys will be ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}. The dictionary values can be empty objects ({}) in requests.

PartialMinimalTrackedResourceWithSkuAndIdentity

Object

Strictly used in update requests.

Name	Type	Description
identity	PartialManagedServiceIdentity	Managed service identity (system assigned and/or user assigned identities)
sku	PartialSku	Sku details required for ARM contract for Autoscaling.
tags	object	Resource tags.

PartialSku

Object

Common SKU definition.

Name	Type	Description
capacity	integer (int32)	If the SKU supports scale out/in then the capacity integer should be included. If scale out/in is not possible for the resource this may be omitted.
family	string	If the service has different generations of hardware, for the same SKU, then that can be captured here.
name	string	The name of the SKU. Ex - P3. It is typically a letter+number code.
size	string	The SKU size. When the name field is the combination of tier and some other value, this would be the standalone code.
tier	SkuTier	This field is required to be implemented by the Resource Provider if the service has more than one tier, but is not required on a PUT.

PoolProvisioningState

Enumeration

State of pool related resources provisioning.

Value	Description
Creating
Deleting
Succeeded
Failed
Updating
Canceled

ScaleUnitConfiguration

Object

Configuration for ScaleUnit pool.

Name	Type	Default value	Description
disablePublicEgress	boolean	False	Gets or sets a value indicating whether PublicEgress is disabled.
registries	string[]		Gets or sets a list of Registry sources that will be used to confirm identity, storage, ACR.

Sku

Object

The resource model definition representing SKU

Name	Type	Description
capacity	integer (int32)	If the SKU supports scale out/in then the capacity integer should be included. If scale out/in is not possible for the resource this may be omitted.
family	string	If the service has different generations of hardware, for the same SKU, then that can be captured here.
name	string	The name of the SKU. Ex - P3. It is typically a letter+number code
size	string	The SKU size. When the name field is the combination of tier and some other value, this would be the standalone code.
tier	SkuTier	This field is required to be implemented by the Resource Provider if the service has more than one tier, but is not required on a PUT.

SkuTier

Enumeration

This field is required to be implemented by the Resource Provider if the service has more than one tier, but is not required on a PUT.

Value	Description
Free
Basic
Standard
Premium

StringStringKeyValuePair

Object

Name	Type	Description
key	string
value	string

systemData

Object

Metadata pertaining to creation and last modification of the resource.

Name	Type	Description
createdAt	string (date-time)	The timestamp of resource creation (UTC).
createdBy	string	The identity that created the resource.
createdByType	createdByType	The type of identity that created the resource.
lastModifiedAt	string (date-time)	The timestamp of resource last modification (UTC)
lastModifiedBy	string	The identity that last modified the resource.
lastModifiedByType	createdByType	The type of identity that last modified the resource.

UserAssignedIdentity

Object

User assigned identity properties

Name	Type	Description
clientId	string (uuid)	The client ID of the assigned identity.
principalId	string (uuid)	The principal ID of the assigned identity.