---
title: "Create or update DMS (classic) Service Instance"
method: PATCH
path: "/subscriptions/{subscriptionId}/resourceGroups/{groupName}/providers/Microsoft.DataMigration/services/{serviceName}"
tags: ["Service resource", "Standard operation", "PATCH"]
---

# Create or update DMS (classic) Service Instance

`PATCH /subscriptions/{subscriptionId}/resourceGroups/{groupName}/providers/Microsoft.DataMigration/services/{serviceName}`

## Request

- Base URL: `https://management.azure.com`
- URL: `https://management.azure.com/subscriptions/{subscriptionId}/resourceGroups/{groupName}/providers/Microsoft.DataMigration/services/{serviceName}`
- Auth: OAuth 2
  - Implicit: `https://login.microsoftonline.com/common/oauth2/authorize`
  - Scopes: `user_impersonation`

The services resource is the top-level resource that represents the Azure Database Migration Service (classic). The PATCH method updates an existing service. This method can change the kind, SKU, and network of the service, but if tasks are currently running (i.e. the service is busy), this will fail with 400 Bad Request ("ServiceIsBusy").

## Path parameters

- `groupName` string, required
- `serviceName` string, required

## Parameters

- `../../../../../../common-types/resource-management/v5/types.json#/components/parameters/ApiVersionParameter` (unresolved $ref)
- `../../../../../../common-types/resource-management/v5/types.json#/components/parameters/SubscriptionIdParameter` (unresolved $ref)

## Request body

- DataMigrationService (unresolved $ref)

## Response `200`

Azure operation completed successfully.

- DataMigrationService (unresolved $ref)

## Other responses

- `202`: Resource update request accepted.
- `default`: An unexpected error response.

---

[API](https://skmtc.dev/azure/apis/azure-database-migration-service-classic-resource-provider.md) - [All operations](https://skmtc.dev/azure/apis/azure-database-migration-service-classic-resource-provider/llms.txt) - [OpenAPI document](https://skmtc.dev/azure/apis/azure-database-migration-service-classic-resource-provider/revisions/a034b56d69ce?raw)