If you can't see the permission you need (I don't remember if its shown in
the UI by default) you need to edit the dssec.dat file. If the attribute is
=7 it means that it will not be displayed in the UI, you need to change it
to either 0,1 or 2. But this will only take care of the visibility in the
UI, you also need to change the DACL on the attribute.
0=Show Read/Write
1=Display Write
2=Display Read
To change the default schema DACL you can use dsacls, but if you do this,
the change will only be applied to objects that are created after the
change, i.e. objects that already exists will not be changed, you need to
script that or do it manually.
One thing you should be aware of is if you want to restore the Schema
defaults with dsacls later you will overwrite DACLs that applications might
have set, Exchange for instance.
In other words be sure to test this in a lab environment before doing it in
production.
Regards,
/Jimmy