Part of software rollout is of course training, but generic, cookie-cutter training for your users just doesn't cut it. Not only will your employees not remember what they learned, but they won't be able to use the tools well for their specific business needs, because effective learning takes place when there is a need where the learning can be immediately applied.
Your users need to only know about tools and features of tools that are enabled for your organization (avoid overwhelm). At the same time, they also need to know about policies that are not necessarily visible to them, yet can affect their work or are expectations that they need to conform to. One example of such an area is external sharing: most people want to do what's best for their organization, so communicating safe information sharing best practices and related behavioral expectations can make your users allies of your IT Security Team.