Hi @Günter Krembsler (admin) ,
Thanks for reaching out.
Could you please share the more details regarding self-service-password reset or share screenshot of portal where it is showing self-service password reset is not implemented.
Also, as far as Exchange Health Box is concerned, they are managed using Managed Availability feature to perform continuous tests that simulate end user actions. You could delete them, but they'll be recreated if the MS Exchange Health Manager service is restarted.
Hope this this help.
Thanks,
Shweta