I can no longer find the thread as this link has spammed Twitter search, but there was some drama earlier in the week about this same issue. Apparently some security researchers were unable to make the feature work and reached out to Microsoft. A Microsoft VP then condescended to their good faith questions and gave a weasel-wordy response that the fix for the feature is in the pipeline. However, if you're not aware of this specific issue, his response reads like the feature is enabled.