On my work MacBook this morning I got a system message that SharePoint is being added as a login item. I don’t see a matching app in my Applications folder, so I am intrigued by this.
UPDATE: I learned this is a component of OneDrive, which is surprisingly honest—as OneDrive sits atop SharePoint technology. I can only hope it truly auto-launches and auto-syncs my folders, as in the past I have needed to specifically launch OneDrive to have access to items in the cloud.