Route My Domains Through Salesforce Edge (Previously Released Critical Update)
Where: This change applies to Lightning Experience and Salesforce Classic in Professional, Enterprise, Performance, Unlimited, and Database.com editions.
When: You can acknowledge this update in Winter ’20. Otherwise, we auto-activate it on July 13, 2020.
Who: Only customers with a My Domain or Custom Domain can be moved to Salesforce Edge. Salesforce Government Cloud orgs are currently excluded from the move to Salesforce Edge.
How: To acknowledge this critical update, from Setup, enter Critical Updates in the Quick Find box, and select Critical Updates. Next to Route My Domains Through Salesforce Edge, click Acknowledge.