With SQL Server 2012 Microsoft introduced the AlwaysOn Availability Group feature, and since then many changes and improvements have been made. This article is an update to another article, and will cover the prerequisites and steps for installing AlwaysOn in your SQL Server 2019 environment.
Before implementing your AlwaysOn Availability Group (AG), make sure you have everything in your environment ready to go. There are several prerequisites that need to be addressed to ensure a successful deployment.
Do not install AlwaysOn on a domain controller The operating system must be Windows 2012 or later Install all available Windows