If Dynamic Host Configuration Protocol (DHCP) is running on this server, check both of the following check boxes and use ...

If Dynamic Host Configuration Protocol (DHCP) is running on this server, check both of the following check boxes and use DHCP tools to add Option 60 to all DHCP scopes.

If a non-Microsoft DHCP server is running on this server, then check the first box and manually configure DHCP option 60.