Merge pull request #248485 from roygara/fixSharedVol

Adding regional restriction

Author: prmerger-automator[bot]

articles/storage/elastic-san/elastic-san-shared-volumes.md

@@ -6,6 +6,7 @@ ms.service: azure-elastic-san-storage
 ms.topic: conceptual
 ms.date: 08/15/2023
 ms.author: rogarana
+ms.custom: references_regions
 ---
 
 # Use clustered applications on Azure Elastic SAN
@@ -23,6 +24,10 @@ When used as a shared volume, elastic SAN volumes can be shared across availabil
 
 See [Support for Azure Storage features](elastic-san-introduction.md#support-for-azure-storage-features) for other limitations of Elastic SAN.
 
+## Regional availability
+
+Currently, only Elastic SAN volumes in France Central can be used as shared volumes.
+
 ## How it works
 
 Elastic SAN shared volumes use [SCSI-3 Persistent Reservations](https://www.t10.org/members/w_spc3.htm) to allow initiators (clients) to control access to a shared elastic SAN volume. This protocol enables an initiator to reserve access to an elastic SAN volume, limit write (or read) access by other initiators, and persist the reservation on a volume beyond the lifetime of a session by default.