1. Scrum will raise impediments
Remind everyone that Scrum will, and is supposed to, raise impediments. Scrum offers a unique and transparent view into the inner workings of an organization. Unfortunately, the view is not always a pretty one. In the early days of learning Scrum, be sure to remind everyone (especially your management) that this is the first step to improvement. You cannot fix problems until you know they exist.
Likewise, be sure your management understands that, in a Scrum organization, their role has changed. No longer are they required to drive employee performance. The self-managed teams now take collective responsibility for technical quality, as well as making and meeting commitments. The Product Owner takes responsibility for product direction and ROI.
Freed from these concerns, management in a Scrum organization must focus on removing impediments. They have a unique view into the organization's long-term goals and strategies and, taken into consideration with input from the ScrumMaster about impact to the team, can ensure the organization removes its highest value impediments.