I have created a MOSS 2007 site on Port 80 which is http://servername The website ca be accessed using this urlNow the client wants to name the site clientname.Parentcompanyname.comThe IT department asked for the FQDN to create a subdomain which i gave ashttp://ServerName.Domain:80Now when i try to access the site using the urlhttp://clientname.Parentcompanyname.com" target="_blank" rel="nofollow">http://clientname.Parentcompanyname.com it says I am not authorized to view thwPage but the same url works on the server.I have also created a Alternatee access Mapping URL as a Intranet zone for theweb application giving the name http://clientname.Parentcompanyname.com" target="_blank" rel="nofollow">http://clientname.Parentcompanyname.com
Not sure here, but try adding http://servername.domain as an AAM too.Make it an internal URL and assign it to any zone you wish.