I want to update from dirxml1.1a to IDM2.

In the installation script I am asked for a user name. If I give the name of
a user who has supervisor rights on root everything is fine, but if I try
the update with a user who has only supervisor rights on the partition the
server hold and the server object belongs to, I get "User Information is not

Is there a way to update to IDM2 not using a User who is supervisor on root?

IDM2 had been installed in the tree, so the schema update is already done.

Thanks in Advance