Computer Configuration > Administrative Templates > Microsoft Edge > Network settings
Both
HKLM\Software\Policies\Microsoft\Edge
List of URL patterns. Requests initiated from websites served by matching origins are blocked from issuing Local Network Access requests. If an origin is covered by both this policy and by 'LocalNetworkAccessAllowedForUrls' (Allow sites to make requests to local network endpoints.), this policy takes precedence. Depending on the stage of the rollout of Local Network Access, LocalNetworkAccessRestrictionsEnabled may also need to be enabled for this policy to block Local Network Access requests. For origins not covered by the patterns specified here, the user's personal configuration will apply. For detailed information on valid URL patterns, please see https://learn.microsoft.com/deployedge/edge-learnmore-ent-policy-url-patterns. Note: This policy improves local network security by blocking specified public websites from accessing private IP addresses. It helps prevent unauthorized external sites from reaching internal resources unless explicitly permitted. For more information about Local Network Access, see https://wicg.github.io/local-network-access/. Example value: http://www.example.com:8080 [*.]example.edu *