Update articles/ai-services/cognitive-services-virtual-networks.md

Author: v-regandowner

articles/ai-services/cognitive-services-virtual-networks.md

@@ -538,7 +538,7 @@ When you create a private endpoint, specify the Azure AI services resource that
 > Azure OpenAI in Azure AI Foundry Models uses a different private DNS zone and public DNS zone forwarder than other Azure AI services. For the correct zone and forwarder names, see [Azure services DNS zone configuration](/azure/private-link/private-endpoint-dns#azure-services-dns-zone-configuration).
 
 > [!WARNING]
-> Requests from clients to the private endpoint need to specify the [custom subdomain](https://learn.microsoft.com/en-us/azure/ai-services/cognitive-services-custom-subdomains) of your Azure AI services resource as the endpoint base URL. 
+> Requests from clients to the private endpoint need to specify the [custom subdomain](/azure/ai-services/cognitive-services-custom-subdomains) of your Azure AI services resource as the endpoint base URL. 
 
 Clients on a virtual network that use the private endpoint use the same connection string for the Azure AI services resource as clients connecting to the public endpoint. The exception is the Speech service, which requires a separate endpoint. For more information, see [Use private endpoints with the Speech service](#use-private-endpoints-with-the-speech-service) in this article. DNS resolution automatically routes the connections from the virtual network to the Azure AI services resource over a private link.