Can we manually change Menu Items?

Is this still valid?

The original menu tree below 'administer' is completely copied from the regular 'Navigation' menu, whereby it is unimportant in which menu these items are contained. -- D5 only yet: You can edit, move and re-organize existing administration menu items or create new ones just as usual. You can also move the whole "Administer" menu tree to a separate menu.

I installed module Domain Access and it created a section called Affiliated content on the Admin page as well in the Admin Menu. I can disable it from appearing in the Admin page by disabling it in the Navigation Menu but it still appears in the Admin Menu.

Can I disable this section in the Admin Menu?