Hello, first I would like to help you clarify in your mind something I have seen take good effect with my clients; that is that you must realize that a B2B unless you are selling a large capital cost necessity such as electricity for a plant or large number license subscription that is turn key (consider AutoCAD) you most likely don't have a B2B. If you are selling a CRM platform that is used by a small % of individuals within a company whether is 1-1000 - focus on the percentage within the firm - or if you are selling a product only used within a corporate setting but is not a capital investment you are most likely selling to professional individuals.
In this case you approach the same way you approach any general consumer product, your market is narrowed down to promote only to the key people who will make the decision but you expose through various channels, you capture emails and other contact, you cold call and ask for the position (maybe linkedin or google before hand)
send follow up emails, email campaigns - the idea is to heavily expose so that those in charge by the time they need to make a decision they have already experienced your brand already and have you standing by.