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There are two approaches for doing app-only for SharePoint:
- Using an Entra ID application: this is the preferred method when using SharePoint Online because you can also grant permissions to other Microsoft 365 services (if needed).
- Using a SharePoint Azure ACS App-Only principal: this method is retired and will stop working from April 2nd 2026.
Both methods are detailed in following articles:
- Granting access via Entra ID App-Only
- Granting access using SharePoint Azure ACS App-Only (retired!)
Important
Using Azure ACS (Access Control Services) for SharePoint Online has been retired as of November 27th 2023 and will stop working from April 2nd 2026, checkout the full retirement announcement to learn more. Using Azure ACS outside of the context of SharePoint was already retired on November 7th, 2018 and is end-of-life now.
Retirement means that the feature will not get any new investments, but it's still supported. End-of-life means that the feature will be discontinued and is no longer available for use.