Hi, I have quite a few of stray cats staying outside my house. However nowadays, one of the stray cat came in my house and wouldn't want to get out from my house. Every single time, we need to "kick" him out of my house instead because he always pee and poop inside my house. We are quite headache about this cat as lately he would "meowing" loudly at our main door day and night which we afraid it could bother our neighbor as well.

I need an advise on how to calm this cat down and what can I do for him for not getting stress of staying outside of our house instead?