How to get dog urine smell out of house?

My husband & I had a medical emergency to attend to (everyone is okay now, thank god) but we had no choice but to leave our dog home alone. We ended up being gone almost all night & our poor dog of course had an accident in the house. He did his business in front of our front door. I’ve mopped the whole floor since then twice but the smell is still there. I’ve had the windows opened just about all morning hoping to “air out” the house but it’s not really doing much.

Our floors are linoleum/vinyl that is supposed to be pet/kid proof. I’m just worried it may have soaked through. We rent our home & our landlord is due to come over sometime today. I really don’t want her walking through the front door & getting a huge smell of dog urine.

Any remedies you know of would be very helpful!