Restored preview labeling for user-managed identity assignment

Author: HeidiSteen

articles/search/search-api-preview.md

@@ -10,7 +10,7 @@ ms.service: cognitive-search
 ms.custom:
   - build-2024
 ms.topic: conceptual
-ms.date: 05/21/2024
+ms.date: 06/11/2024
 ---
 
 # Preview features in Azure AI Search
@@ -19,6 +19,8 @@ This article identifies all features in public preview. This list is helpful for
 
 Preview features are removed from this list if they're retired or transition to general availability. For announcements regarding general availability and retirement, see [Service Updates](https://azure.microsoft.com/updates/?product=search) or [What's New](whats-new.md).
 
+Data plane preview features are listed in the following table.
+
 |Feature                          | Category | Description | Availability  |
 |---------|------------------|-------------|---------------|
 |  [**Scalar quantization**](vector-search-how-to-configure-compression-storage.md#option-3-configure-scalar-quantization) | Index | Compress vector index size in memory and on disk using built-in scalar quantization. | [Create or Update Index (preview)](/rest/api/searchservice/indexes/create-or-update?view=rest-searchservice-2024-03-01-preview&preserve-view=true) to add a `compressions` section to a vector profile. |
@@ -46,6 +48,13 @@ Preview features are removed from this list if they're retired or transition to
 | [**featuresMode parameter**](/rest/api/searchservice/preview-api/search-documents#query-parameters) | Relevance (scoring) | Relevance score expansion to include details: per field similarity score, per field term frequency, and per field number of unique tokens matched. You can consume these data points in [custom scoring solutions](https://github.com/Azure-Samples/search-ranking-tutorial). | [Search Documents (preview)](/rest/api/searchservice/preview-api/search-documents), 2019-05-06-Preview or later.|
 | [**moreLikeThis**](search-more-like-this.md) | Query | Finds documents that are relevant to a specific document. This feature has been in earlier previews. | [Search Documents (preview)](/rest/api/searchservice/preview-api/search-documents) calls, in all supported API versions: 2023-10-10-Preview, 2023-07-01-Preview, 2021-04-30-Preview, 2020-06-30-Preview, 2019-05-06-Preview, 2016-09-01-Preview, 2017-11-11-Preview. |
 
+Control plane preview features are listed in the following table.
+
+|Feature                          | Category | Description | Availability  |
+|---------|------------------|-------------|---------------|
+| [**User-assigned managed identity**](search-howto-managed-identities-data-sources.md) | Service | Configures a search service to use a previously created user-assigned managed identity. | [UPDATE](rest/api/searchmanagement/services/update?view=rest-searchmanagement-2024-03-01-preview&preserve-view=true#identity), 2021-04-01-preview or a later. |
+
+
 ## Preview features in Azure SDKs
 
 Each Azure SDK team releases beta packages on their own timeline. Check the change log for mentions of new features in beta packages:

articles/search/search-howto-managed-identities-data-sources.md

@@ -11,11 +11,14 @@ ms.custom:
   - ignite-2023
   - build-2024
 ms.topic: how-to
-ms.date: 06/10/2024
+ms.date: 06/11/2024
 ---
 
 # Configure a search service to connect using a managed identity in Azure AI Search
 
+> [!IMPORTANT]
+> User-assigned managed identity is in public preview under [Supplemental Terms of Use](https://azure.microsoft.com/support/legal/preview-supplemental-terms/). The [Management 2024-03-01-Preview REST API](/rest/api/searchmanagement/services/update?view=rest-searchmanagement-2024-03-01-preview&preserve-view=true#identity) provides user-assigned managed identities for Azure AI Search. Support for a system-assigned managed identity is generally available.
+
 You can use Microsoft Entra ID and role assignments for outbound connections from Azure AI Search to resources providing data, applied AI, or vectorization during indexing or queries. 
 
 To use roles on an outbound connection, first configure your search service to use either a [system-assigned or user-assigned managed identity](../active-directory/managed-identities-azure-resources/overview.md) as the security principle for your search service in a Microsoft Entra tenant. Once you have a managed identity, you can assign roles for authorized access. Managed identities and role assignments eliminate the need for passing secrets and credentials in a connection string or code.
@@ -28,7 +31,13 @@ To use roles on an outbound connection, first configure your search service to u
 
 ## Supported scenarios
 
-Azure AI Search can use a system-assigned or user-assigned managed identity on outbound connections to Azure resources. A system managed identity is indicated when a connection string is the unique resource ID of a Microsoft Entra ID-aware service or application. A user-assigned managed identity is specified through an "identity" property.
+Azure AI Search can connect to other Azure resources under its system-assigned or a user-assigned managed identity. 
+
++ Search service configuration of a system-assigned managed identity is generally available. 
++ Search service configuration of a user-assigned managed identity is in public preview, under supplemental terms of use.
++ Data plane usage of a managed identity, whether system or user-assigned, is generally available. For example, if you want a user-assigned managed identity on an indexer data source connection, key vault, debug session, or enrichment cache, you can use a generally available REST API version to create the connection, assuming the feature you're using is also generally available.
+
+A system managed identity is indicated when a connection string is the unique resource ID of a Microsoft Entra ID-aware service or application. A user-assigned managed identity is specified through an "identity" property.
 
 A search service uses Azure Storage as an indexer data source and as a data sink for debug sessions, enrichment caching, and knowledge store. For search features that write back to storage, the managed identity needs a contributor role assignment as described in the ["Assign a role"](#assign-a-role) section. 
 
@@ -119,12 +128,21 @@ For more information, see [Create or Update Service (Management REST API)](/rest
 
 ---
 
-## Create a user-assigned managed identity
+## Create a user-assigned managed identity (preview)
 
 A user-assigned managed identity is a resource on Azure. You can create multiple user-assigned managed identities if you want more granularity in role assignments. For example, you might want separate identities for different applications and scenarios.
 
+Steps are:
+
++ In your Azure subscription, create a user-assigned managed identity.
++ On your search service, update a search service to use the user-assigned managed identity (this step is in preview).
++ On other Azure services you want to connect to, create a role assignment.
++ In data source connections on Azure AI Search, such as an indexer data source, specify a connection that references the user-managed identity (this step is generally available if support for the feature is generally available).
+
 A user-assigned managed identity can be scoped to subscriptions, resource groups, or resource types. 
 
+Associating a user-assigned managed identity is supported in the Azure portal, in preview versions of the Management REST APIs, and in beta SDK packages that provide the feature.
+
 ### [**Azure portal**](#tab/portal-user)
 
 1. Sign in to the [Azure portal](https://portal.azure.com)
@@ -149,12 +167,12 @@ A user-assigned managed identity can be scoped to subscriptions, resource groups
 
 ### [**REST API**](#tab/rest-user)
 
-You can use the Management REST API instead of the portal to assign a user-assigned managed identity. 
+You can use a preview Management REST API instead of the portal to assign a user-assigned managed identity. Use API versions `2021-04-01-preview` or later. This example uses `2024-03-01-preview`.
 
-1. Formulate a request to [Create or Update a search service](/rest/api/searchmanagement/services/create-or-update).
+1. Formulate a request to [UPDATE](rest/api/searchmanagement/services/update?view=rest-searchmanagement-2024-03-01-preview&preserve-view=true#identity) a search service.
 
     ```http
-    PUT https://management.azure.com/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Search/searchServices/mysearchservice?api-version=2023-11-01
+    PUT https://management.azure.com/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Search/searchServices/mysearchservice?api-version=2024-03-01-preview
     {
       "location": "[region]",
       "sku": {
@@ -178,7 +196,7 @@ You can use the Management REST API instead of the portal to assign a user-assig
 
    + "type" is the type of identity. Valid values are "SystemAssigned", "UserAssigned", or "SystemAssigned, UserAssigned" for both. A value of "None" clears any previously assigned identities from the search service.
 
-   + "userAssignedIdentities" includes the details of the user assigned managed identity. This identity [must already exist](../active-directory/managed-identities-azure-resources/how-manage-user-assigned-managed-identities.md) before you can specify it in the Create or Update Service request.
+   + "userAssignedIdentities" includes the details of the user assigned managed identity. This identity [must already exist](../active-directory/managed-identities-azure-resources/how-manage-user-assigned-managed-identities.md) before you can specify it in the Update Service request.
 
 ---
 
@@ -210,6 +228,8 @@ The following steps illustrate the role assignment workflow. This example is for
 
 Once a managed identity is defined for the search service and given a role assignment, outbound connections can be modified to use the unique resource ID of the other Azure resource. Here are some examples of connection strings for various scenarios.
 
+You can use generally available REST API versions and Azure SDK packages for these connections.
+
 > [!TIP]
 > You can create most of these objects in the Azure portal, specifying either a system or user-assigned managed identity, and then view the JSON definition to get the connection string.