I've installed a new site using MSM but when I hit the domain it's showing the content from our original domain. I'm not sure where to look for this.
In your index.php file for the second site (or third or fourth...) there are $assign_to_config variables.
From the docs:
$assign_to_config['site_name'] = 'domain2_short_name'; $assign_to_config['cp_url'] = 'http://domain2.com/admin.php'; $assign_to_config['site_url'] = 'http://domain2.com';
All three should be set properly or it can default to the main site.