MC792601 – (Updated) SharePoint Framework domain isolated web parts retirement

Product:

Microsoft 365 admin center, SharePoint

Platform:

Online, Web, World tenant

Status:

Change type:

Admin impact, Retirement, Updated message, User impact

Links:

Details:

Summary:
SharePoint Framework domain isolated web parts will be disabled for new tenants starting April 2, 2025, and fully retired for all tenants by April 2, 2026. Organizations must update these web parts to regular ones before then, as they will stop functioning and show errors after retirement.

Details:
Updated October 3, 2025: This update serves as a reminder that SharePoint Framework domain isolated web parts will retire and stop working in 6 months from now (April 2, 2026).
After careful consideration and extensive review of usage data and feedback Microsoft has decided to retire the domain isolated web parts feature in the SharePoint Framework (SPFx).
[When will this happen:]
Starting April 2, 2025, domain isolated web parts will be turned off for any newly created tenants.
Starting April 2, 2026, Microsoft will remove the ability to use domain isolated web parts for existing tenants.

Change Category:
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Scope:
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Release Phase:

Created:
2024-05-14

updated:
2025-10-03

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**

Retirement of Domain Isolated Web Parts
Existing domain isolated web parts will stop functioning and display errors, impacting user access to critical functionalities.
   - roles: SharePoint Administrators, End Users
   - references: https://aka.ms/retirement/domainisolatedwebparts/support, https://learn.microsoft.com/sharepoint/api-access

Increased Support Requests
Users may experience confusion and increased support requests due to the sudden unavailability of previously functional web parts.
   - roles: Helpdesk Support, End Users
   - references: https://aka.ms/Retirement/domainisolatedwebparts/update

Operational Disruption
Organizations may face operational disruptions as workflows relying on domain isolated web parts fail, leading to potential project delays.
   - roles: Project Managers, SharePoint Administrators
   - references: https://aka.ms/retirement/domainisolatedwebparts/support " target="_blank" rel="nofollow noopener noreferrer">https://aka.ms/retirement/domainisolatedwebparts/support

Need for Immediate Updates
Organizations will need to allocate resources urgently to update and redeploy web parts, diverting attention from other projects.
   - roles: Developers, IT Operations
   - references: https://learn.microsoft.com/sharepoint/api-access

User Experience Degradation
Users will experience a degradation in service quality as essential features become unavailable, leading to frustration and decreased productivity.
   - roles: End Users, Business Analysts
   - references: https://aka.ms/Retirement/domainisolatedwebparts/update

Configutation Options**

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Potentional Risks**

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IT Security**

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explanation for non-techies**

Microsoft is planning to retire a specific feature in SharePoint called "domain isolated web parts." Think of these web parts like special tools or gadgets in a toolbox that have been kept separate for security reasons. By April 2, 2025, new users won't be able to use these tools anymore, and by April 2, 2026, they will be completely removed for everyone.

Imagine if you had a special type of lock on your office door that required a unique key. This lock was designed to provide extra security, but over time, it became outdated and wasn't used as much. Eventually, the building management decides to replace it with a standard lock that everyone else uses. This means you'll need to change your lock to the standard one to ensure your office remains secure and accessible.

Similarly, organizations using these domain isolated web parts need to update them to regular web parts. If they don't, these parts will stop working and show error messages. To check if your organization is using these special web parts, you can look at the SharePoint admin center. If you see permissions listed under "Isolated," it means you're using them. Microsoft provides resources and instructions on how to update these web parts to ensure a smooth transition.

There won't be an option to keep using these domain isolated web parts after April 2, 2026, so it's important to plan and make the necessary updates before then. This change is like ensuring all your office locks are updated to the new standard before the old ones are completely phased out.