When tracking visits on an intranet website, Matomo assigns all page views to a few visitors who have very high page views count. How to fix it?

On Intranet websites, often most users have the same IP address, and often the same browser and configuration settings. This causes Matomo (Piwik) to believe that most page views come from the same visitor. To fix this on Intranet websites, see this FAQ: Enabling Matomo on Intranet websites.