I have ane Exchange 2007 SP3 environment. I've found that by editing the english user template from the toolbox on EMC, i can change the fields' attributes on the GAL. I can make these fields 'Read-Only: False', and when I open the GAL, i can enter text on the fields; but the problem is, when I click 'apply' to save the changes, it gives me an error message when i try to edit any user's GAL info:
"One or more chnages you made cannot be saved. You do not have sufficient permissions to perform this operation for this object".
I'm already domain admin, enterprise admin, exchange admin, even schema admin.