Hi I am testing Exchange 2010 for the first time on a testserver. I didn't realize prior to the test-installation, that during the installation there have been automatic changes on my (productive) Domain Controller too (The Exchange testserver is on a separate Windows Server). Before I'll do the productive Exchange installation, I will need to be sure, that on my DC there are no elements from my Exchange test installation anymore. I performed the standard Exchange installation and I didn't do any manual changes on my DC. What are the steps to roll back all the changes on my domain controller? Thanks for your advices. Patrick

Restore from backup of the domain controller. The changes that have been made are irreversible in a supported manner. Microsoft support might be able to do it for you. The simple rule is never install anything test on to a product network, even on a "test" server. If you remove Exchange 2010 using add/remove programs that should remove most traces of the settings from the domain, but you cannot eradicate everything. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.