Exchange 2010 permissions




I have a root domain and a child domain. I have installed exchange 2010 in the child domain. When I go to open the exchange console in the child domain with the account that installed exchange I get error "processing data from the remote server failed with the following error message. the userchild\exchadmin isnt assigned any management roles.

I noticed nearly all the security groups including "organization management" is in the root domain. This domain is just a place holder domain. Should the exchadmin account in the child domain be a member of any security groups in the root domain?