Update concepts-networking.md

Author: GennadNY

articles/postgresql/flexible-server/concepts-networking.md

@@ -74,7 +74,8 @@ Here are some concepts to be familiar with when you're using virtual networks wi
   At this time, we don't support NSGs where an ASG is part of the rule with Azure Database for PostgreSQL - Flexible Server. We currently advise using [IP-based source or destination filtering](../../virtual-network/network-security-groups-overview.md#security-rules) in an NSG. 
 
   > [!IMPORTANT]
-  > High availability Features of Azure Database for PostgreSQL - Flexible Server require ability to send\receive traffic to destination ports 5432, 6432 within Azure virtual network subnet where Azure Database for PostgreSQL - Flexible Server is deployed , as well as to Azure storage for log archival. If you create [Network Security Groups (NSG)](../../virtual-network/network-security-groups-overview.md) to deny traffic flow to or from your Azure Database for PostgreSQL - Flexible Server within the subnet where its deployed, please make sure to allow traffic to  destination ports 5432 and 6432 within the subnet, and also to Azure storage by using [service tag](../../virtual-network/service-tags-overview.md) Azure Storage as a destination.
+  > High availability and other Features of Azure Database for PostgreSQL - Flexible Server require ability to send\receive traffic to destination port 5432 within Azure virtual network subnet where Azure Database for PostgreSQL - Flexible Server is deployed , as well as to Azure storage for log archival. If you create [Network Security Groups (NSG)](../../virtual-network/network-security-groups-overview.md) to deny traffic flow to or from your Azure Database for PostgreSQL - Flexible Server within the subnet where its deployed, please make sure to allow traffic to  destination ports 5432  within the subnet, and also to Azure storage by using [service tag](../../virtual-network/service-tags-overview.md) Azure Storage as a destination. Also, if you elect to use [Azure Active Directory authentication](concepts-azure-ad-authentication.md) to authenticate logins to your Azure Database for PostgreSQL - Flexible Server please allow outbound traffic to Azure AD using Azure AD [service tag](../../virtual-network/service-tags-overview.md)
+
 
 * **Private DNS zone integration**. Azure private DNS zone integration allows you to resolve the private DNS within the current virtual network or any in-region peered virtual network where the private DNS zone is linked.