Added persistence info for Enterprise

Data persistence in Enterprise and Enterprise Flash tiers are in preview. This wasn't reflected in the doc as it currently stands.

Author: MSFTeegarden

articles/azure-cache-for-redis/cache-high-availability.md

@@ -22,7 +22,7 @@ Various high availability options are available in the Standard, Premium, and En
 | [Zone redundancy](#zone-redundancy) | Multi-node replicated configuration across Availability Zones, with automatic failover | 99.9% in Premium; 99.99% in Enterprise (see [details](https://azure.microsoft.com/support/legal/sla/cache/v1_1/)) |-|✔|✔|
 | [Geo-replication](#geo-replication) | Linked cache instances in two regions, with user-controlled failover | Premium; Enterprise (see [details](https://azure.microsoft.com/support/legal/sla/cache/v1_1/)) |-|Passive|Active|
 | [Import/Export](#importexport) | Point-in-time snapshot of data in cache.  | 99.9% (see [details](https://azure.microsoft.com/support/legal/sla/cache/v1_1/)) |-|✔|✔|
-| [Persistence](#persistence) | Periodic data saving to storage account.  | 99.9% (see [details](https://azure.microsoft.com/support/legal/sla/cache/v1_1/)) |-|✔|-|
+| [Persistence](#persistence) | Periodic data saving to storage account.  | 99.9% (see [details](https://azure.microsoft.com/support/legal/sla/cache/v1_1/)) |-|✔|Preview|
 
 ## Standard replication for high availability
 
@@ -81,7 +81,7 @@ When a data node becomes unavailable or a network split happens, a failover simi
 
 ## Persistence
 
-Applicable tiers: **Premium**
+Applicable tiers: **Premium**, **Enterprise (Preview)**, **Enterprise Flash (Preview)**
 
 Because your cache data is stored in memory, a rare and unplanned failure of multiple nodes can cause all the data to be dropped. To avoid losing data completely, [Redis persistence](https://redis.io/topics/persistence) allows you to take periodic snapshots of in-memory data, and store it to your storage account. If you experience a failure across multiple nodes causing data loss, your cache loads the snapshot from storage account. For more information, see [Configure data persistence for a Premium Azure Cache for Redis instance](cache-how-to-premium-persistence.md).