SQL Server 2014 MDS has a limitation. There could be only one MDS Administrator.
In this tip we have provided some tips and the best practices on granting permissions in MDS.
Please read my latest MSSQL Tip: “SQL Server 2014 Master Data Services Assigning Administrator Permissions“.
Check out all of my tips here: http://www.mssqltips.com/sqlserverauthor/94/svetlana-golovko/.