Added clarification

Author: niklarin

articles/cosmos-db/postgresql/how-to-configure-authentication.md

@@ -43,7 +43,7 @@ Once done proceed with [configuring Microsoft Entra authentication](#configure-a
 
 ### Prerequisites
 
-User need to be allowed to sign in to Azure Cosmos DB for PostgreSQL in the Microsoft Entra tenant.
+Users need to be allowed to sign in to Azure Cosmos DB for PostgreSQL in the Microsoft Entra tenant. These steps should be performed once for the Microsoft Encarta tenant that is going to be used for authentication on the Azure Cosmos DB for PostgreSQL cluster.
 
 > [!IMPORTANT]
 > Microsoft Entra ID tenant administrator permissions are needed to make the change. See [guidance for troubleshooting permissions](/entra/identity/enterprise-apps/add-application-portal-configure#prerequisites).