Update backup-azure-database-postgresql-support-matrix.md

Author: v-bllyd

articles/backup/backup-azure-database-postgresql-support-matrix.md

@@ -30,8 +30,9 @@ East US, East US 2, Central US, South Central US, West US, West US 2, West Centr
 
 - Recommended limit for the maximum database size is 400 GB.
 - Cross-region backup isn't supported. Therefore, you can't back up an Azure PostgreSQL server to a vault in another region. Similarly, you can only restore a backup to a server within the same region as the vault. However, we support cross-subscription backup and restore. 
+- Backup of Azure PostgreSQL servers with Private endpoint enabled is currently not supported.
 - Only the data is recovered during restore; _roles_ aren't restored.
 
 ## Next steps
 
-- [Back up Azure Database for PostgreSQL server](backup-azure-database-postgresql.md)
+- [Back up Azure Database for PostgreSQL server](backup-azure-database-postgresql.md)