Added Managed Identity for credential

Author: Pietervanhove

docs/relational-databases/security/ledger/ledger-digest-management.md

@@ -61,6 +61,14 @@ CREATE CREDENTIAL [https://ledgerstorage.blob.core.windows.net/sqldbledgerdigest
 WITH IDENTITY='SHARED ACCESS SIGNATURE',  
 SECRET = '<your SAS key>'   
 ```  
+> [!NOTE]
+> Starting with SQL Server 2022 Cumulative Update 17 (CU17) and continuing in SQL Server 2025, you can use [managed identities with SQL Server credentials](../../../t-sql/statements/create-credential-transact-sql#g-create-and-use-a-managed-identity-credential-to-access-azure-blob-storage). Managed identities provide an identity for applications to use when connecting to resources that support Microsoft Entra authentication.
+
+>This feature is supported only in:
+>- SQL Server on Azure VMs
+>- SQL Server 2025 Arc-enabled
+
+>Managed identities are not supported for on-premises SQL Server deployments.
 
 #### Azure Confidential Ledger Permission