New whitepaper: Minimum Database Permissions Requirements for Microsoft Sync Framework
Are you trying to set up a sync-ready database with the lowest (i.e. most secure) permissions possible? Have you set it up, but are worried you might have opened things up too wide?
Perhaps our just-published whitepaper on this very topic can be of assistance: https://msdn.microsoft.com/en-us/library/ee730363.aspx