Solution : https://service.sap.com/sap/support/notes/1312645 (SAP Service marketplace login required)
Key words :
choose upload/download -> upload scenario, sap mdm global data synchronization 2, grmg scenario definition zip files, grmg scenario definition files delivered, gds xml scenario definition files, ccms alert monitor - transaction rz20 -, gds global data synchronization, extras > activate maintenance function, newly created monitor set, contained monitor collection definition
Related Notes :
1278657 | Central Note for SAP NetWeaver MDM GDS 2.0 |