A utility control point created on SQL Server 2008 R2 Enterprise can have a maximum of 25 managed instances of SQL Server. ...

A utility control point created on SQL Server 2008 R2 Enterprise can have a maximum of 25 managed instances of SQL Server. For more information, see your SQL Server 2008 R2 Enterprise license terms and Features Supported by the Editions of SQL Server 2008 R2 in SQL Server Books Online.