Update use-your-data.md

update instructions for vpn

Author: lindazqli

articles/ai-services/openai/concepts/use-your-data.md

@@ -70,10 +70,12 @@ There is an [upload limit](../quotas-limits.md), and there are some caveats abou
 ### Azure OpenAI resources
 
 You can protect Azure OpenAI resources in [virtual networks and private endpoints](/azure/ai-services/cognitive-services-virtual-networks) the same way as any Azure AI service.
+> [!NOTE]
+> If you disable public network access of Azure OpenAI resources, you can call /extensions/chat/completions API or chat with your existing index on Studio. However, vector search and blob/file ingestion on Studio are not supported.
 
 ### Azure Cognitive Search resources
 
-If you have an Azure Cognitive Search resource protected by a private network, and want to allow Azure OpenAI on your data to access your search service, complete [an application form](https://aka.ms/applyacsvpnaoaionyourdata). The application will be reviewed in five business days and you will be contacted via email about the results. If you are eligible, we will send a private endpoint request to your search service, and you will need to approve the request.
+If you have an Azure Cognitive Search resource protected by a private network, and want to allow Azure OpenAI on your data to access your search service, complete [an application form](https://aka.ms/applyacsvpnaoaionyourdata). The application will be reviewed in ten business days and you will be contacted via email about the results. If you are eligible, we will send a private endpoint request to your search service, and you will need to approve the request.
 
 :::image type="content" source="../media/use-your-data/approve-private-endpoint.png" alt-text="A screenshot showing private endpoint approval screen." lightbox="../media/use-your-data/approve-private-endpoint.png":::
 
@@ -221,6 +223,7 @@ Azure OpenAI on your data provides several search options you can use when you a
 > [!IMPORTANT]
 > * [Semantic search](/azure/search/semantic-search-overview#availability-and-pricing) and [vector search](https://azure.microsoft.com/pricing/details/cognitive-services/openai-service/) are subject to additional pricing. You need to choose **Basic or higher SKU** to enable semantic search or vector search. See [pricing tier difference](/azure/search/search-sku-tier) and [service limits](/azure/search/search-limits-quotas-capacity) for more information.
 > * To help improve the quality of the information retrieval and model response, we recommend enabling [semantic search](/azure/search/semantic-search-overview) for the following languages: English, French, Spanish, Portuguese, Italian, Germany, Chinese(Zh), Japanese, Korean, Russian, Arabic
+> * If you enable vector search, you need to enable public network access of your Azure OpenAI resources.
 
 | Search option       | Retrieval type | Additional pricing? |Benefits|
 |---------------------|------------------------|---------------------| -------- |