For the frontend, you can override for example the login widget and create some custom logic which will disable the "Forgot Password " link for the roles you wish not to be able to access the feature. However, such behaviour, for the backend, can be hardly achieved ( role specific ) as the buttons and the areas that need to be hidden are implemented in a more complex way. Still you can try to disable them via CSS, but this will be valid for all users, not only users in specific roles.
All the best,
the Telerik team
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