How to Remove a Server from a Group
A server can only be associated with one BizTalk group. If a server already belongs to another group, you must first remove that server from its current group before you can add it to a new group.
To perform this procedure, you must be logged on as a member of the Windows Administrators group.
To remove a server from a group
On the computer that you want to remove from a BizTalk Server group, click Start, click All Programs, click Microsoft BizTalk Server 20xx, and then click BizTalk Server Configuration.
On the menu bar, click Unconfigure Features.
In the Unconfigure Features dialog box, select Group, and then click OK.
Unconfiguring a group will also unconfigure all dependent features that are already configured on that computer.
In the Microsoft BizTalk Server Configuration Wizard, click Next.
The Group and its dependent features are unconfigured.