Update use-container-storage-with-elastic-san.md

Author: khdownie

articles/storage/container-storage/use-container-storage-with-elastic-san.md

@@ -21,6 +21,10 @@ ms.custom: references_regions
 > [!NOTE]
 > To use Azure Container Storage with Azure Elastic SAN, your AKS cluster should have a node pool of at least three [general purpose VMs](../../virtual-machines/sizes-general.md) such as **standard_d4s_v5** for the cluster nodes, each with a minimum of four virtual CPUs (vCPUs).
 
+## Limitations
+
+Azure Elastic SAN doesn't support volume snapshots.
+
 ## Regional availability
 
 [!INCLUDE [container-storage-regions](../../../includes/container-storage-regions.md)]