Did you hear of room lists? What is a room list?
A room list is a collection of room mailboxes. Room lists are specially marked distribution groups that you can also use the same way you use ‘regul...
Glad to see negative numbers and zero included in the floor filtering, like Zoomer83 and KarriS suggested. That being said, where FloorLabels are used, I believe Microsoft should leverage them, and order the list of floors by the integer number. So, allow options like "B" (-1), "G" (0), "Mezzanine" (1), 2, 3, 4, 5, 6, "Observation deck". At worst, where there are inconsistent FloorLabels, simply repeat each one in alphabetical order: "B" (-1), "Subway" (-1), "G" (0), ... "2-East" (2), "2-West" (2) ...
Also, what if instead of an integer stepper, the Floor filter acted more like the "Features" drop-down, where you could check multiple floors simultaneously. Users can This might mitigate any challenges with merging numeric and alphanumeric floor names. It also resolves a challenge with a scenario where a company doesn't rent all the floors sequentially, and so users scroll through floor numbers that will always be "We didn't find any conference rooms"
Here's an idea of what that could look like. The list would have to allow scrolling for buildings with a large number of floors: