Perform the following in the Azure Console:

1. Login to Azure Portal using https://portal.azure.com
2. Go to Azure Database for PostgreSQL server
3. For each database, click on Connection security
4. In SSL settings
5. Click on ENABLED to Enforce SSL connection

Perform the following in Azure Command Line Interface 2.0:

Use the below command to enforce ssl connection for PostgreSQL Database.

az postgres server update –resource-group <resourceGroupName> –name <serverName> –ssl-enforcement Enabled

References:

1. https://docs.microsoft.com/en-us/azure/postgresql/howto-configure-server-parameters-using-portal#prerequisites