English to German Bus/Financial Tourism & Travel

I'm translating a travel agency survey and am not quite sure how to best translate managed business travel and unmanaged business travel.

Meaning:
Managed business travel: meaning a travel agent has a formal arrangement with one or more companies, preferred or pre-established rates, preferred or pre-established suppliers, and/or a tool travelers must use to book travel]
Unmanaged business travel:meaning individuals book their own business travel through travel agent without having to go through a set process, back-end tool, or without supplier or rate restrictions.

Many thanks
Nadine