Back to Announcements

Microsoft 365 Alert – Azure Content Delivery Network (CDN) Edgio Decommissioning – 15th January 2025

Announcements Sourav Nandi

14/01/2025 14:45 PM

We have been informed by Microsoft that the Azure Azure Content Delivery Network (CDN) from Edgio is being decommissioned on the 15th January 2025.

What is Azure CDN?

Azure Content Delivery Network is a Microsoft Azure service that delivers content to users quickly and reliably. It’s a global network that uses servers near each user to distribute content.

How it works

Distributes requests: Azure CDN distributes user requests to edge servers.

Caches content: Azure CDN caches static content at physical nodes around the world.

Delivers content: Azure CDN delivers content directly from the edge servers, which are closer to the user.

What it can be used for?

Websites, Mobile apps, Streaming media, Gaming software, IoT endpoints, and Firmware updates.

 Benefits  

  • Improves performance and user experience
  • Reduces load times
  • Saves bandwidth
  • Improves responsiveness
  • Protects content
  • Lowers latency

Verizon Edgio CDN for Azure is a content delivery network (CDN) service that can be integrated with Azure solutions. It’s designed to reduce the load on the origin server and avoid extra latency in media delivery.

Action Required: 

To ensure organisations are not impacted by the decommissioning of the Edgio CDN, organisations should ensure that their local firewall rules include both *.msauth.net and *.msftauth.net entries in their allowlists. These entries will permit connectivity to any Azure CDN preventing impact by any future degradations of backup CDN providers Microsoft may use. Speak to your networking managers / service providers to validate and amend these endpoints if required. For further information on Microsoft URLs and IP addresses, please refer to Microsoft 365 URLs and IP address ranges – Microsoft 365 Enterprise | Microsoft Learn

Issues that may be observed

Organisations utilising the Edgio CDN who have firewalls configured to not allow traffic to both *.msauth.net and *.msftauth.net may experience a blank page while trying to sign in to Microsoft Entra. Please ensure the guidance stated above is followed to mitigate any impact.

Please accept our apologies for the short notice of this announcement. This information has been recently shared with the Accenture team.

To report any issues, please contact 0333 200 1133 / helpdesk@nhs.net

back to top