check before: 2025-06-01
Product:
SharePoint
Platform:
Online, US Instances, Web, World tenant
Status:
In development
Change type:
Admin impact
Links:
Details:
Summary:
Microsoft SharePoint Online will migrate to a new CDN service, Microsoft Azure Front Door, starting June 2025 and completing by July 2025. Organizations should add the new domain `public-cdn.sharepointonline.com` to their allow list, avoid hardcoding CDN URLs, and continue allowing the old domain. No admin action is required before the rollout.
Details:
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.
Change Category:
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Scope:
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Release Phase:
General Availability
Created:
2025-05-02
updated:
2025-05-02
Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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MS Urgency
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MS workload name
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linked item details
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summary for non-techies**
Starting June 2025, Microsoft SharePoint Online will switch its content delivery to Microsoft Azure Front Door, requiring organizations to add `public-cdn.sharepointonline.com` to their network's allow list while keeping the old domain `publiccdn.sharepointonline.com` until further notice.
Direct effects for Operations**
CDN Domain Allow Listing
Failure to add the new CDN domain to the allow list may result in users being unable to access SharePoint Online assets, leading to disruptions in service.
- roles: IT Administrator, End User
- references: https://learn.microsoft.com/microsoft-365/enterprise/use-microsoft-365-cdn-with-spo?view=o365-worldwide
Hardcoded CDN URLs
If organizations have hardcoded the old CDN URLs, they may experience broken links or missing assets on SharePoint pages, negatively impacting user experience.
- roles: Web Developer, Content Manager
- references: https://learn.microsoft.com/microsoft-365/enterprise/use-microsoft-365-cdn-with-spo?view=o365-worldwide
Old CDN Domain Blocking
Blocking the old CDN domain could lead to incomplete loading of SharePoint Online content, causing frustration and inefficiencies for users.
- roles: IT Administrator, End User
- references: https://learn.microsoft.com/microsoft-365/enterprise/use-microsoft-365-cdn-with-spo?view=o365-worldwide
Performance Issues
Without proper preparation, the transition to the new CDN may lead to temporary performance issues, such as slower load times for SharePoint assets.
- roles: End User, IT Support
- references: https://learn.microsoft.com/microsoft-365/enterprise/use-microsoft-365-cdn-with-spo?view=o365-worldwide
User Training and Awareness
Lack of communication about the changes may result in users being unaware of new access methods, leading to confusion and decreased productivity.
- roles: End User, Training Coordinator
- references: https://learn.microsoft.com/microsoft-365/enterprise/use-microsoft-365-cdn-with-spo?view=o365-worldwide
Configutation Options**
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Opportunities**
Enhanced Performance Monitoring
The migration to Microsoft Azure Front Door for CDN can enhance performance metrics collection. By leveraging Azure's monitoring tools, IT can gain insights into CDN performance, user access patterns, and potential bottlenecks, allowing for proactive adjustments and optimizations.
- next-steps: Evaluate current performance monitoring tools and integrate Azure Monitor for enhanced analytics and reporting on CDN usage.
- roles: IT Manager, System Administrator, Network Engineer
- references: https://learn.microsoft.com/en-us/azure/azure-monitor/overview, https://techcommunity.microsoft.com/t5/microsoft-365-developer-blog/monitoring-your-sharepoint-online-usage-with-azure-monitor/ba-p/2236466
Improved User Experience through Asset Optimization
With the transition to the new CDN, there is an opportunity to optimize the assets hosted on SharePoint Online. This includes compressing images, minifying scripts, and ensuring that only necessary assets are served, which can significantly enhance load times and user experience.
- next-steps: Conduct an audit of current assets hosted on SharePoint and implement optimization strategies before the CDN migration.
- roles: Web Developer, Content Manager, UX Designer
- references: https://web.dev/optimize-images/, https://web.dev/optimize-javascript/
Cost-effective CDN Management
By utilizing the new CDN service, organizations can potentially reduce costs associated with bandwidth and storage, as Azure Front Door offers competitive pricing models. This can lead to long-term savings as the organization scales its use of SharePoint Online.
- next-steps: Review current CDN usage costs and compare them with Azure Front Door pricing to identify potential savings and adjust budget forecasts accordingly.
- roles: Finance Officer, IT Manager, Procurement Specialist
- references: https://azure.microsoft.com/en-us/pricing/details/front-door/, https://www.datacenterknowledge.com/archives/2020/05/19/how-azure-front-door-can-reduce-your-cdn-costs
Potentional Risks**
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IT Security**
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explanation for non-techies**
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