Fairly informal and more results oriented rather than confirming the nature of the request, but you could also use the following:
'Will do' is good, it's affirmative, short, and it's action/results oriented.
'Understood, we'll make that happen.' This includes both the understanding element as well as a results-focused promise.
Just saying 'understood' can come off as overly terse/short, but also serious, no-nonsense, or with a military type bearing. Some types of people prefer this kind of communication, however.