Salesforce Lightning CDN Preference Auto Enablement

As part of improving the Lightning Experience performance, we are introducing more utilization of the Content Delivery Network (CDN) in resolving Salesforce content to reduce network roundtrip latency.

As this only impacts Salesforce owned content, we are enabling the org preference to be ON for customers that have the preference set to OFF.  There is no required action that needs to be taken as this will be enabled by Salesforce.

Administrators can turn off the preference in Setup | Session Settings by deselecting the Enable Content Delivery Network (CDN) for Lightning Component framework checkbox.  Please note that disabling the CDN is not recommended because it can impact performance.

If any issues are being experienced with this feature, work with your IT Department to ensure "a.static.lightning.force.com" and "b.static.lightning.force.com" are added to your allowlist as described in this Release Note.  Please reach out to Salesforce Customer Support if any further questions or issues.