Hi @Michelle Schwan - Are you using Azure Database for PostgreSQL or do you have PostgreSQL Server deployed to an Azure VM? If you are using the DB PaaS (Azure Database for PostgreSQL) you do not have access to the file system to edit these files. What are you attempting to accomplish?
Reference
[Google Docs] How to set up PostgreSQL for high availability and replication with Hot Standby (link)
[MicrosoftDocs] Install and configure PostgreSQL on Azure VM (link)
[MicrosoftDocs] High availability concepts in Azure Database for PostgreSQL - Flexible Server (link)