One-stop solution: You need an organization that can be your one-stop destination for all your business needs. When you decide to integrate some particular software into your system, you need a lot of things to be taken care of. Only an organization that is an expert in its work can be helpful.
Integration solution: Integrating Microsoft NAV is also a very technical task. You should choose only those organizations that would help you to integrate this software with your system. This is a very technical thing. So there are fewer chances that you would be able to do it yourself.