Merge pull request #280096 from madsd/vnetdnsserver

vnet dns servers

Author: prmerger-automator[bot]

articles/app-service/overview-name-resolution.md

@@ -16,7 +16,7 @@ Your app uses DNS when making calls to dependent resources. Resources could be A
 
 If you aren't integrating your app with a virtual network and custom DNS servers aren't configured, your app uses [Azure DNS](../virtual-network/virtual-networks-name-resolution-for-vms-and-role-instances.md#azure-provided-name-resolution). If you integrate your app with a virtual network, your app uses the DNS configuration of the virtual network. The default for virtual network is also to use Azure DNS. Through the virtual network, it's also possible to link to [Azure DNS private zones](../dns/private-dns-overview.md) and use that for private endpoint resolution or private domain name resolution. 
 
-If you configured your virtual network with a list of custom DNS servers, name resolution uses these servers. If your virtual network is using custom DNS servers and you're using private endpoints, you should read [this article](../private-link/private-endpoint-dns.md) carefully. You also need to consider that your custom DNS servers are able to resolve any public DNS records used by your app. Your DNS configuration needs to either forward requests to a public DNS server, include a public DNS server like Azure DNS in the list of custom DNS servers or specify an alternative server at the app level.
+If you configured your virtual network with a list of custom DNS servers, name resolution in App Service will use up to five custom DNS servers. If your virtual network is using custom DNS servers and you're using private endpoints, you should read [this article](../private-link/private-endpoint-dns.md) carefully. You also need to consider that your custom DNS servers are able to resolve any public DNS records used by your app. Your DNS configuration needs to either forward requests to a public DNS server, include a public DNS server like Azure DNS in the list of custom DNS servers or specify an alternative server at the app level.
 
 When your app needs to resolve a domain name using DNS, the app sends a name resolution request to all configured DNS servers. If the first server in the list returns a response within the timeout limit, you get the result returned immediately. If not, the app waits for the other servers to respond within the timeout period and evaluates the DNS server responses in the order you configured the servers. If none of the servers respond within the timeout and you configured retry, you repeat the process.