We have an exchange 2007 in a coexistence environment with exchange 2003. One of the consultant is invited for installing a new exchange mailbox and hub transport server. What are the minimum permissions required for installation.Ahmed Ali

Schema Admin, Enterprise Admin, Domain Admin in all domains because the first installation updates the schema, forest and domains. You can get by with less if you do some of the work for him.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Schema Admin, Enterprise Admin, Domain Admin in all domains because the first installation updates the schema, forest and domains. You can get by with less if you do some of the work for him.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

You can extend the Active Directory schema and create the Active Directory objects and universal security groups to support Exchange 2007 before you install the server roles. Run setup.com /PrepareAD from the command line on the domain controller that is the schema master at the forest root. When you run setup.com /PrepareAD, the task setup.com /PrepareLegacyExchangePermissions also runs to create the universal security group that is granted permissions to send e-mail to Exchange 2007 Hub Transport servers. If you do not perform this task before you start installation, it will run during installation.Noya Lau TechNet Community Support

Thanks All.Ahmed Ali