Update vector-search-vectorizer-azure-open-ai.md

Updated with endpoints that are supported only.

Author: gmndrg

articles/search/vector-search-vectorizer-azure-open-ai.md

@@ -8,7 +8,7 @@ ms.service: cognitive-search
 ms.custom:
   - build-2024
 ms.topic: reference
-ms.date: 05/28/2024
+ms.date: 07/25/2024
 ---
 
 # Azure OpenAI vectorizer
@@ -28,7 +28,7 @@ Parameters are case-sensitive.
 
 | Parameter name	 | Description |
 |--------------------|-------------|
-| `resourceUri` | The URI of a model provider, such as an Azure OpenAI resource or an OpenAI URL.  |
+| `resourceUri` | The URI of the model provider, in this case, an Azure OpenAI resource. This parameter only supports URLs with domain `openai.azure.com`, such as `https://<resourcename>.openai.azure.com`. If the Azure OpenAI endpoint has a URL with domain `cognitiveservices.azure.com`, like `https://<resourcename>.cognitiveservices.azure.com`, a [custom subdomain](/azure/ai-services/openai/how-to/use-your-data-securely#enabled-custom-subdomain) with `openai.azure.com` must be created first for the Azure OpenAI resource and use `https://<resourcename>.openai.azure.com` instead.  |
 | `apiKey`   |  The secret key used to access the model. If you provide a key, leave `authIdentity` empty. If you set both the `apiKey` and `authIdentity`, the `apiKey` is used on the connection. |
 | `deploymentId`   | The name of the deployed Azure OpenAI embedding model. The model should be an embedding model, such as text-embedding-ada-002. See the [List of Azure OpenAI models](/azure/ai-services/openai/concepts/models) for supported models.|
 | `authIdentity`   | A user-managed identity used by the search service for connecting to Azure OpenAI. You can use either a [system or user managed identity](search-howto-managed-identities-data-sources.md). To use a system manged identity, leave `apiKey` and `authIdentity` blank. The system-managed identity is used automatically. A managed identity must have [Cognitive Services OpenAI User](/azure/ai-services/openai/how-to/role-based-access-control#azure-openai-roles) permissions to send text to Azure OpenAI. |
@@ -70,4 +70,4 @@ The expected field dimensions for a field configured with an Azure OpenAI vector
 
 + [Integrated vectorization](vector-search-integrated-vectorization.md)
 + [How to configure a vectorizer in a search index](vector-search-how-to-configure-vectorizer.md)
-+ [Azure OpenAI Embedding skill](cognitive-search-skill-azure-openai-embedding.md)
++ [Azure OpenAI Embedding skill](cognitive-search-skill-azure-openai-embedding.md)