Hi,
we solve the issue like this:
1 - rename the variable name, Ex:user.microapp.ToExtVXML to user.microapp.ToExtVXML2. Then all ICM scripts change automatically the nodes to the new variable name;
2 - recreate the variable with desired campus, user.microapp.ToExtVXML;
3 - change the scripts to use the new recreated variable, user.microapp.ToExtVXML;
4 - delete the old variable, user.microapp.ToExtVXML2.
thanks to all.