The addition of the first fully managed device to a legacy network requires both server setup and device setup.
The managed node requires that servers be installed or assigned to provide the following actors:
DHCP Server
DNS Server
NTP Server
LDAP Server
These may be existing servers that need only administrative additions, they may be existing hardware that has new software added, and these may be one or multiple different systems. DHCP, DNS, and NTP services are provided by a very wide variety of equipment.