If you want to connect live data with the Data Streamer add-in for Excel, but you don't see the Data Streamer tab in the Excel ribbon, you first need to turn on the Data Streamer add-in.
Go to File > Options > Add-Ins. Make sure COM Add-ins is selected in the Manage box, and click Go. In the COM add-Ins dialog box, make sure the box next to Data Streamer add-in is selected.
After the add-in is turned on, the Data Streamer tab will appear in the ribbon.
Note: If you don't see an entry for Data Streamer add-in in the COM Add-Ins dialog box, it's because either your version of Office or Excel doesn't include it, or your organization's system administrator has made it unavailable.