@Nigel24120264gn0u there isn't a direct "auto-load CSF on startup" feature built into Illustrator. But, you might be able to place your .csf file (Color Settings File) in a location where Illustrator expects to find it, or to use scripting/deployment tools to manage the settings. More or less, place the custom .csf file in Illustrator's Color Settings directory on each user's machine. Once it's there, it will appear in the Color Settings dropdown, and you can potentially set it as the default.