check before: 2025-11-25
Product:
Microsoft 365 Apps, Microsoft 365 for the web, Microsoft Edge, Teams
Platform:
Online, US Instances, Web, World tenant
Status:
Change type:
User impact, Admin impact
Links:
Details:
Summary:
Admins must configure the LocalNetworkAccessAllowedForUrls policy in Chrome-based browsers to allow specific Microsoft eCDN URLs, ensuring optimal Teams Live Events performance amid new Local Network Access restrictions starting with Chrome 142. Apply settings via Group Policy or registry keys; see documentation for details.
Details:
We're making some changes to the Microsoft eCDN configuration.
Starting with Chrome 142, browsers will enforce Local Network Access restrictions that may impact Microsoft eCDN peer-to-peer functionality.
Change Category:
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Scope:
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Release Phase:
Created:
2025-11-26
updated:
2025-11-26
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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summary for non-techies**
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Direct effects for Operations**
Local Network Access Restrictions
Failure to configure the LocalNetworkAccessAllowedForUrls policy may lead to degraded performance of Teams Live Events due to blocked peer-to-peer functionality.
- roles: IT Admin, End User
- references: https://learn.microsoft.com/ecdn/how-to/configure-local-network-access-policy
User Experience Degradation
Users may experience interruptions or delays during Teams Live Events if the necessary URLs are not whitelisted, impacting their ability to participate effectively.
- roles: End User, Event Organizer
- references: https://learn.microsoft.com/ecdn/how-to/configure-local-network-access-policy
Increased Support Tickets
Unprepared changes may result in a surge of support requests from users facing issues with Teams Live Events, leading to increased workload for IT support teams.
- roles: IT Support, End User
- references: https://learn.microsoft.com/ecdn/how-to/configure-local-network-access-policy
Configutation Options**
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Opportunities**
Enhanced User Experience for Teams Live Events
By configuring the LocalNetworkAccessAllowedForUrls policy, users will experience improved performance during Teams Live Events and Town Halls, as peer-to-peer functionality will be preserved. This will reduce latency and improve streaming quality, directly benefiting users participating in these events.
- next-steps: Implement the LocalNetworkAccessAllowedForUrls policy in the organizationâs Group Policy or via registry keys, ensuring all relevant URLs are included. Conduct testing with a small group of users to verify performance improvements before a full rollout.
- roles: IT Administrators, Event Coordinators, End Users
- references: https://learn.microsoft.com/ecdn/how-to/configure-local-network-access-policy
Streamlined IT Operations
The requirement to configure LocalNetworkAccessAllowedForUrls can be centralized through Group Policy management, allowing IT to manage settings for all users efficiently. This reduces the need for individual configurations and ensures compliance across the organization.
- next-steps: Review current Group Policy settings and create a dedicated policy for LocalNetworkAccessAllowedForUrls. Train IT staff on managing and troubleshooting these settings to streamline future updates.
- roles: IT Administrators, Network Engineers
- references: https://learn.microsoft.com/ecdn/how-to/configure-local-network-access-policy
Cost-Efficiency through Reduced Support Calls
By ensuring that the LocalNetworkAccessAllowedForUrls policy is correctly configured, the organization can reduce the number of support calls related to performance issues during Teams Live Events. This leads to lower operational costs associated with IT support.
- next-steps: Monitor support ticket trends related to Teams Live Events before and after the implementation of the policy. Use this data to assess the impact on support costs and identify further opportunities for efficiency.
- roles: IT Support Staff, Help Desk Managers
- references: https://learn.microsoft.com/ecdn/how-to/configure-local-network-access-policy
Potentional Risks**
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IT Security**
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explanation for non-techies**
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** AI generated content. This information must be reviewed before use.
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Last updated 2 months ago ago
