If you have already performed the xref:migration/index.adoc[initial migration steps] for your Reactive application, you're now ready to perform steps specific to Reactive applications.
== Use `AuthorizationManager` for Method Security
In 6.0, `@EnableReactiveMethodSecurity` defaults `useAuthorizationManager` to `true`.
So, to complete migration, {security-api-url}org/springframework/security/config/annotation/method/configuration/EnableReactiveMethodSecurity.html[`@EnableReactiveMethodSecurity`] remove the `useAuthorizationManager` attribute:
{security-api-url}org/springframework/security/web/server/authentication/AuthenticationWebFilter.html[`AuthenticationWebFilter`] propagates {security-api-url}org/springframework/security/authentication/AuthenticationServiceException.html[``AuthenticationServiceException``]s to the {security-api-url}org/springframework/security/web/server/ServerAuthenticationEntryPoint.html[`ServerAuthenticationEntryPoint`].
Because ``AuthenticationServiceException``s represent a server-side error instead of a client-side error, in 6.0, this changes to propagate them to the container.
So, if you opted into this behavior by setting `rethrowAuthenticationServiceException` too `true`, you can now remove it like so: