Multiple listings in 1 address

I have a client who uses the FlexMLS IDX plugin and it works great. BUT, we recently ran into an issue we hadn’t seen before. She logs into MLS and creates a link to a property, but that building (address) has multiple properties inside of it (It’s a big building). How do we differentiate between suites inside a building like that when it need multiple listings? Just selecting the building seems to generate a link to the first alphabetical listing for that building.