Open Hyperlinks in Formula Fields Correctly (Previously Released Critical Update)
Where: This change applies to Lightning Experience and the Salesforce app in all editions.
When: This update is enforced when a sandbox or production org is upgraded to Summer ’20. Enforcement starts on June 15, 2020 and takes effect when your instance is upgraded to Summer ’20. To find the exact activation date for your instance, refer to https://status.salesforce.com.
How: From Setup, enter Critical Updates in the Quick Find box. Then select Critical Updates. For Lightning Experience Honors Target Values for Hyperlinks in Formula Fields, click Acknowledge.