Reader extension for Google Chrome does not install

We have deployed Adobe Reader DC throughout our enterprise via SCCM, and according to this support page (Open PDFs in Acrobat Reader from Chrome) a prompt should appear to install the Chrome extension the first time Reader is launched following the installation.

This prompt is either being dismissed by our users, or is not appearing at all.

Is there any alternative way to install the Chrome extension? Even just resetting/re-triggering the prompt, or preferably to automatically install the extension as part of the SCCM executable.

Thanks.