Previous M-Files versions carried a WebView2 installer bundled at the time of their creation. This is not the case anymore.
As of the June 2024 release (24.6), an M-Files installation that includes M-Files Client or M-Files Admin relies on the WebView2 component coming from the operating system.
It is installed already on most modern systems, the supported platforms for WebView2 match, at the time of writing, the M-Files OS requirements, so for most machines there should be no difference.
If it isn't installed already, the M-Files installer will try to download it via Microsoft Updates, which will require an Internet connection that allows updates/installations. M-Files cannot provide firewall rules for the Windows Updates/installations, however.
This change streamlines the WebView2 version to the Evergreen version that Microsoft maintains and reduces the M-Files installation package size.
If the WebView2 installation fails, there will be a warning shown to the user in attended installations (similar to "Installing Microsoft Edge WebView2 failed"), and a warning in the Windows Event Log that can also be used for unattended installations in case the installation fails so you can install it according to your company's policies. For example, at the time of writing, the Microsoft Download page offers a bootstrap installer that downloads files locally (if the M-Files installation did not succeed, this is not likely to succeed), a full-blown installer for the Evergreen version (which is what is necessary and recommended, and you can distribute it as needed), and custom version downloads.
