One or more VM instances with IIS installed.

Either SQL 2016 Express installed on one of the VMs (use of SQL Express or better at the end of the process, depending on the requirements, making it a local database to use as it is, or Azure SQL. If using the later, it is helpful to still have SQL Express installed, to check the connection with the Azure SQL database).

Azure portal, creation of a database.

Azure portal, creation of a file storage with BLOB capacity (for synchronization with local storage and reducing IIS workload).

Azure portal, creation of a load balancer (if required), allowing for the distribution of traffic between multiple VMs.

If SSL encryption is required, one SSL certificate issued by an official certification authority per VM.

Scenario 1 – Single Azure Virtual Machine on local DB

Scenario 2 – Single Azure Virtual Machine on Azure SQL DB

Scenario 3: Multiple Azure VMs, Azure SQL DB, Local Storage, BLOB storage

Microsoft Azure - Back up Procedure: https://docs.microsoft.com/en-us/azure/backup/backup-azure-vms-introduction