Merge pull request #104157 from Karishma-Tiwari-MSFT/patch-147

(ForumsTeam) fixes MicrosoftDocs/azure-docs#47952

Author: PRMerger18

articles/aks/troubleshooting.md

@@ -116,7 +116,7 @@ Naming restrictions are implemented by both the Azure platform and AKS. If a res
 
 * Cluster names must be 1-63 characters. The only allowed characters are letters, numbers, dashes, and underscores. The first and last character must be a letter or a number.
 * The AKS *MC_* resource group name combines resource group name and resource name. The auto-generated syntax of `MC_resourceGroupName_resourceName_AzureRegion` must be no greater than 80 chars. If needed, reduce the length of your resource group name or AKS cluster name.
-* The *dnsPrefix* must start and end with alphanumeric values. Valid characters include alphanumeric values and hyphens (-). The *dnsPrefix* can't include special characters such as a period (.).
+* The *dnsPrefix* must start and end with alphanumeric values and must be between 1-54 characters. Valid characters include alphanumeric values and hyphens (-). The *dnsPrefix* can't include special characters such as a period (.).
 
 ## I’m receiving errors when trying to create, update, scale, delete or upgrade cluster, that operation is not allowed as another operation is in progress.
 
@@ -491,4 +491,4 @@ This error is due to an upstream cluster autoscaler race condition where the clu
 
 <!-- LINKS - internal -->
 [view-master-logs]: view-master-logs.md
-[cluster-autoscaler]: cluster-autoscaler.md
+[cluster-autoscaler]: cluster-autoscaler.md