The properties of an OU (f.e. the name) can be modified.
Step 1. Navigate to the OU you wish to edit, to the tab Properties and click 
Step 2. Edit the information and click Save
Note: It depends on your page layout and field behaviour which fields can be edited here. See Working with page lay outs for more information on page layouts, for more information on field configuration ask your administrator or see the QRC Custom Fields on our support portal.