BrowserStack is a cloud web and mobile testing platform that enables developers to test their websites and mobile applications across on-demand browsers, operating systems, and real mobile devices, without requiring users to install or maintain an internal lab of virtual machines, devices or emulators.
We use it for cross-browser testing. If people are using different operating systems or browsers, we try to replicate their issue.
https://www.browserstack.com/start
If you do not have access, let Dakota know.