Hi,
In the Execution --> Data Sources screen, you will have to create a new data source with the Data Source type as one of the following and provide the OCUM server details.
For 7-Mode: OnCommand Unified Manager (DFM) - 5.2 7 Mode (SYBASE)
For Clustered Data ONTAP: OnCommand Unified Manager (DFM) - 5.2 for Clustered Data ONTAP (SYBASE)
Thanks,
Shailaja