Employees need to understand that up front. Build consensus . In building consensus, the leader helps the team move toward general agreement. This does not mean that all employees will agree with a particular decision. That simply won't happen very often.
Disagreement is natural in a team setting.
Your job is to direct the process so that these disagreements are positive, but open and honest. Get all issues on the table. Continually probe for additional input until you feel most or all of the issues have been brought forward. Allow employees to express their opinion, but keep the discussions on track if you are in a group meeting. Keep the conversation focused and moving.