I cann't remove a trust domain, because when I'm going to remove thedomainthe button is disabled. Now the question is: How else can I delete?

Hi, This is the forum for Exchange.I recommend you to post the issue in Windows Server newsgroup tp get relevant help. Discussions in Windows Server 2003 http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.hk.windowsserver2003 Base on my research,you can refer to the below article: How To Determine Trust Relationship Configurations http://support.microsoft.com/kb/228477/en-us Thanks for your understanding. Best regards, Xiu