You connect to a computer that is running Windows Server 2008 and that is acting as a Dynamic Host Configuration Protocol (DHCP) server. You use the Microsoft Management Console (MMC) DHCP snap-in on a computer that is running Windows Server 2008 R2 to make this connection. Then, you use the DHCP snap-in to convert the DHCP server's existing lease to a reservation. When you do this, the lease on the Windows Server 2008-based computer is marked as inactive. It is no longer displayed in the DHCP snap-in.
Note The same behavior occurs on a client computer that is running Remote Server Administration Tools (RSAT) and Windows 7 and on a DHCP server that is running Windows Server 2003. Converting a lease to a reservation on the client computer or on the DHCP server marks the lease as inactive.