TXT record update

Author: greg-lindsay

articles/dns/dns-private-records.md

@@ -5,7 +5,7 @@ author: greg-lindsay
 ms.service: dns
 ms.topic: conceptual
 ms.workload: infrastructure-services
-ms.date: 10/12/2023
+ms.date: 12/04/2023
 ms.author: greglin
 ---
 
@@ -85,7 +85,9 @@ The DNS standards permit a single TXT record to contain multiple strings, each o
 
 When calling the Azure DNS REST API, you need to specify each TXT string separately.  When you use the Azure portal, PowerShell, or CLI interfaces, you should specify a single string per record. This string is automatically divided into 255-character segments if necessary.
 
-The multiple strings in a DNS record shouldn't be confused with the multiple TXT records in a TXT record set.  A TXT record set can contain multiple records, *each of which* can contain multiple strings.  Azure private DNS supports a total string length of up to 1024 characters in each TXT record set (across all records combined).
+The multiple strings in a DNS record shouldn't be confused with the multiple TXT records in a TXT record set.  A TXT record set can contain multiple records, *each of which* can contain multiple strings.  Azure DNS supports a total string length of up to 4096 characters`*` in each TXT record set (across all records combined).
+
+`*` 4096 character support is currently only available in the Azure Public Cloud. National clouds are limited to 1024 characters until 4k support rollout is complete.
 
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