Hi, 1. I have Install a new Root domain controller "test.com" 2. Install a child domain controller in it "child.test.com" 3. Install a member server in child domain "ps.child.test.com" Now I want to install Exchange server in my PS member server. The problem is that when I login on my ps in child domain I am not able to run the forest prep because the enterprise/ schema admin rights are required for that. I tried to make the child administrator member of Enterprise and schema admin, but I am not able to add child administrator say the users not found. As both the Enterprise and schema admin group are global security group so how do I delegate the child domain administrator the permission so that I can run the forest prep and domain prep by logging in to my PS using child administrator account? What is the procedure to give the delegation of Schema and Enterprise admin right to other child domain users so that Exchange can be installed without login in to root domain controller ? Thanks,Manjeet