Ensure that Setup pages in Lightning Experience load content correctly when browsers block third-party cookies. If your users have general access to the internet, no action is required. If your company controls users’ or servers’ access to the internet through firewalls or allowlists, your IT department must add *.salesforce-setup.com to the company’s list of allowed domains. Salesforce Setup pages are now hosted on that domain
When: Setup pages move to the *.salesforce-setup.com domain through a staggered rollout. The rollout began in Spring ’24 and continues through Summer ’24 and Winter ’25. The change is first enabled in sandboxes and nonproduction orgs, and then in production orgs
