MSSQL: Export Wizard, not possible to save SSIS Package
edit: found the solution: https://msdn.microsoft.com/en-us/library/mt238486.aspx

SSMS can only connect to SQL Server 2016 Integrated Services (SSIS 2016) instances. There is a known compatibility limitation with SQL Server Integration Services that prevents connecting to previous versions. As a workaround for this problem, you can connect to your SQL Server Integration Service instance by using the SSMS release aligned with your SSIS instance.