Update data-box-heavy-limits.md

Author: LakshJ-MS

articles/databox/data-box-heavy-limits.md

@@ -22,7 +22,8 @@ Consider these limits as you deploy and operate your Azure Data Box Heavy device
 ## Data Box Heavy limits
 
 - Data Box Heavy can store a maximum of 1 billion files per node.
-- Data Box Heavy supports a maximum of 512 containers or shares per node in the cloud. The top-level directories within the user share become containers or Azure file shares in the cloud. 
+- Data Box Heavy supports a maximum of 512 containers or shares per node in the cloud. The top-level directories within the user share become containers or Azure file shares in the cloud.
+- Data Box currently does not support the scenario where the customer's data is actively changing during export
 
 ## Azure Storage limits