Merge pull request #111679 from anthonychu/20200416-taskhub-naming-rules

Add Durable Functions task hub naming rules

Author: PRMerger16

articles/azure-functions/durable/durable-functions-task-hubs.md

@@ -30,7 +30,13 @@ All of these resources are created automatically in the default Azure Storage ac
 
 ## Task hub names
 
-Task hubs are identified by a name that is declared in the *host.json* file, as shown in the following example:
+Task hubs are identified by a name that conforms to these rules:
+
+* Contains only alphanumeric characters
+* Starts with a letter
+* Has a minimum length of 3 characters, maximum length of 45 characters
+
+The task hub name is declared in the *host.json* file, as shown in the following example:
 
 ### host.json (Functions 2.0)