Change display name in a single OU

Change display name in a single OU

I found where I can change the attributes for the entire organization but is there any way to do this for a single OU. I just added over 500 users and found a way to add a space to the display name instead of it being put together. I'd rather not remove them all and add them again just for the space.
                New to ADManager Plus?

                  New to ADSelfService Plus?