thanks for you quick response, but I'm not sure if I we are talking about the same thing, what I meant was facebook tagging, so when you upload to facebook you are promt to identify people in the picture. so the search is by facebook users and not necessarily by photo as a photo can contain multiple facebook users. Hope this explains correctecly
I am sorry for the inconvenience.
Tagging cannot be done while uploading the images from Lightroom.
You need to go to Facebook to tag the images after uploading them to Facebook.
Hope this helps.
thanks for the response, I will proceed that way