Yes I still use the ancient MSN believe it or not 
The problem is keeping everything signed in to MSN at the same time: phone, desktop and laptop. No problem with laptop and PC staying signed in at the same time and I always get the message "you are now signed in at more than once place".
But the issue is when the phone is involved.
If I'm signed in to MSN on my laptop, or PC, or both simultaneously, and then I sign into MSN on my phone from the phone's IM app, both the laptop and desktop PC get signed out automatically. Or if I'm signed in on my phone and then sign in on laptop or PC, I get signed out of the phone. Is there an option on the phone to keep me signed in all machines? On the full version of MSN on my laptop and PC, I've ticked the box that says "Show me all other the places I'm signed in at when I sign in". "You can sign in to Messenger from more than one place and receive messages everywhere you're signed in".

The problem is keeping everything signed in to MSN at the same time: phone, desktop and laptop. No problem with laptop and PC staying signed in at the same time and I always get the message "you are now signed in at more than once place".
But the issue is when the phone is involved.
If I'm signed in to MSN on my laptop, or PC, or both simultaneously, and then I sign into MSN on my phone from the phone's IM app, both the laptop and desktop PC get signed out automatically. Or if I'm signed in on my phone and then sign in on laptop or PC, I get signed out of the phone. Is there an option on the phone to keep me signed in all machines? On the full version of MSN on my laptop and PC, I've ticked the box that says "Show me all other the places I'm signed in at when I sign in". "You can sign in to Messenger from more than one place and receive messages everywhere you're signed in".