Hello Nick C 2024,
Welcome to the Microsoft Community.
The official documentation for the feature description was written a long time ago (at least a couple of months), but unfortunately, until today, this feature has not been officially launched yet, even in Beta version. I fully understand your urgency.
Group photos by people - Microsoft Support

As of 01/01/2025....
See screenshots below, all taken on 01/01/2025.
When I go and look at group of faces, as of today, 01/01/2025, it is still finding faces in pre-September 2024 photos and asking me to confirm if it is the same person.
It appears that the recognition stopped working for new photos around 4th September 2024. It was only when I went to make a couple of "year in review" albums this morning that I noticed this. It's extremely frustrating as I spent an entire day naming each group, and there are 600+ photos in some groups.
Based on the results of our investigation, we must inform you that it appears Microsoft has deactivated this feature for reasons that are currently unclear. We appreciate your interest in the photo categorization feature based on AI auto-recognition of portraits. However, we recognize that there are still improvements to be made, thus the feature is currently unavailable.
If what you say is correct, it is completely unacceptable for Microsoft to withdraw a service which forms part of a paid-for service (I have OneDrive premium), without giving the user any advance warning.
Note: I am in the UK, and I have seen some confusion over the status of EU regulation surrounding facial recognition. Having left the European Union, the UK is no longer subject to EU law on this subject, which is why Google Photos is able to allow recognition and other services not allowed in EU member countries. This might be the source of some of the confusion?


