: You can create a local "layout" of the SSMS installer to make it completely offline.

Finally, the offline installer does not easily adapt to customisation. A web installer might offer to download only the features selected, minimising the footprint. The offline ISO contains everything . You still choose features at install time, but the entire payload is resident on your media, consuming local storage or transfer bandwidth upfront.

SQL Server Express is the free version. Microsoft does not typically provide a full ISO for Express. Instead, they offer a small executable that downloads the rest of the files.

Since 2016, SSMS is a separate download and often uses a "bootstrapper" that requires internet during installation.

The primary appeal of the offline installer is sovereignty over the deployment process. A web installer, by its very nature, reaches out to Microsoft’s servers at the moment of installation to download the required components. This introduces several variables: the availability of an internet connection, the speed and stability of that connection, and the potential for changes in the remote files between installations.

Perfect for secure "air-gapped" servers.

Here is a comprehensive guide structured as a blog post or knowledge base article. You can adapt this for your website, documentation, or internal wiki.

Use the exact same file for multiple installations.