Microsoft SharePoint Online: [Important update] Enabling a new Public Content Delivery Network (CDN) domain [MC1066155]

Message ID: MC1066155

Coming soon: We will migrate the hosting of Microsoft SharePoint Online assets to a new content delivery network (CDN) service, Microsoft Azure Front Door (AFD).

This message is associated with Microsoft 365 Roadmap ID 489230.

[When this will happen:]

General Availability (Worldwide): We will begin rolling out early June 2025 and expect to complete by late July 2025.

[How this will affect your organization:]

As part of this migration, we will introduce a new public CDN domain, public-cdn.sharepointonline.com. To ensure your SharePoint Online (SPO) sites and pages are fully prepared, please review these guidelines:

Add the new domain to your network allow list: If you enable domain-based allow lists in your network configurations, please ensure that the new domain public-cdn.sharepointonline.com is also included.
Avoid hardcoding CDN URLs: To ensure seamless integration and for future proofing, please refrain from hardcoding the CDN URLs in your applications and scripts.
Do not block the old domain: The old CDN domain publiccdn.sharepointonline.com is still in use. Please continue to allow access to the existing CDN domain until further notification from us.

[What you need to do to prepare:]

Review your current configuration to assess the impact on your organization. This rollout will happen automatically by the specified dates with no other admin action required before the rollout.

We appreciate your cooperation and understanding as we work to enhance the performance and reliability of SharePoint Online. If you have questions or need further assistance, please do not hesitate to reach out to our support team.

Thank you for your attention to this important update.

Learn more about CDN for SPO: Use Office 365 Content Delivery Network (CDN) with SharePoint Online – Microsoft 365 Enterprise | Microsoft Learn

Source: Microsoft

Mike Rosoft

1 May 2025, 6:33 pm

This important update about migrating Microsoft SharePoint Online assets to a new content delivery network (CDN) service, specifically Microsoft Azure Front Door, is set to roll out from early June to late July 2025. Both admins and users will feel the effects of these changes, and here’s a quick assessment.

For admins, the transition to the new public CDN domain, public-cdn.sharepointonline.com, means a bit of preparation work. They’ll need to ensure that this new domain is added to their network allow list, which may require some configuration adjustments. The good news? The migration will happen automatically, so there’s no need for panic or last-minute scrambling. Just a friendly reminder to avoid hardcoding CDN URLs in applications and scripts—future-proofing is the name of the game, after all!

Users can look forward to enhanced performance and reliability when accessing SharePoint Online content. With the new CDN, loading times should improve, leading to a smoother experience overall. However, it’s important for users to remain aware that the old domain will still be in use for the time being, so don’t block it just yet!

In terms of impact, the changes are likely to be quite significant. Faster access to resources can improve productivity, and a smoother user experience is always a welcome change. Plus, admins can feel reassured knowing that these updates are aimed at enhancing the overall functionality of SharePoint Online.

As we gear up for this change, it’s a great opportunity for everyone to share thoughts and experiences. Have you encountered any challenges or successes with CDN integrations in the past? Let’s hear your stories in the comments! For more insights, don’t forget to check out other posts on mwpro.co.uk.

Let’s embrace this update with open arms and a sprinkle of humor—after all, who doesn’t love a good CDN joke? (Just kidding, I promise to keep the jokes to a minimum!)

1 Comment

Mike Rosoft


1 May 2025, 6:33 pm

This important update about migrating Microsoft SharePoint Online assets to a new content delivery network (CDN) service, specifically Microsoft Azure Front Door, is set to roll out from early June to late July 2025. Both admins and users will feel the effects of these changes, and here’s a quick assessment.

For admins, the transition to the new public CDN domain, public-cdn.sharepointonline.com, means a bit of preparation work. They’ll need to ensure that this new domain is added to their network allow list, which may require some configuration adjustments. The good news? The migration will happen automatically, so there’s no need for panic or last-minute scrambling. Just a friendly reminder to avoid hardcoding CDN URLs in applications and scripts—future-proofing is the name of the game, after all!

Users can look forward to enhanced performance and reliability when accessing SharePoint Online content. With the new CDN, loading times should improve, leading to a smoother experience overall. However, it’s important for users to remain aware that the old domain will still be in use for the time being, so don’t block it just yet!

In terms of impact, the changes are likely to be quite significant. Faster access to resources can improve productivity, and a smoother user experience is always a welcome change. Plus, admins can feel reassured knowing that these updates are aimed at enhancing the overall functionality of SharePoint Online.

As we gear up for this change, it’s a great opportunity for everyone to share thoughts and experiences. Have you encountered any challenges or successes with CDN integrations in the past? Let’s hear your stories in the comments! For more insights, don’t forget to check out other posts on mwpro.co.uk.

Let’s embrace this update with open arms and a sprinkle of humor—after all, who doesn’t love a good CDN joke? (Just kidding, I promise to keep the jokes to a minimum!)

1 Comment

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