I used Zeph release(s) of mac os x and never had a problem logging in to msn with Aduim, never used MSN for Osx but aduim worked flawless with everything I used. Yahoo, Aim, MSN.

O another note, if you have a router with firewall you may have to edit it. Aduim keep crashing when I would use aduim and found I needed to add ports to my firewall and then no problem after that