We have just merged with another company. We have a Two-Way Forest trust established successfully between us, Domain A and them, Domain B. We are trying to give users in Domain B access to Sharepoint.
The issue is that users from Domain B are being challenged for a username and password when connecting to a site on Sharepoint at Domain A. Once they login, there are little anomalies that have to do with permission (see description below). We, Domain A, are a Windows 2003 domain with Sharepoint 2007 running. Domain B, is a Windows 2008R2 domain running at Windows 2003 functional level.
In Sharepoint we have gone into Shared Services Administration> User Profiles and Properties>View Import Connections and created a new connection to Domain B's Active Directory. The Domain B's users now appear in View User Profiles.
Besides being challenged for the un/pw, when they get to the site, the little attachement paperclip icon does not appear, replaced with a generic red X as if the folder permissions in IIS are not correct (the clip is in _images folder).
Any advice on what we have done wrong or left out would be appreciated. Talk slowly, we aren't Sharepoint people.