I have two companies (2003 Servers), company1.com and company2.com. Each company has a separate domain in a separate forest. There is a two-way trust between the two domains in the two different forests. Company1 has an Exchange 2003 server. I would like to be able to assign Exchange boxes to users in Company2 and have the single Exchange server in Company1 handle all mail for Company2. Is this possible or is there an alternative solution?