Running into a problem getting PowerPivot for SharePoint 2013 installed and configured. We are running SharePoint 2013 Configuration database version: 15.0.4649.1000 with SQL Server 2014.
Followed the instructions here for installing PowerPivot https://technet.microsoft.com/en-us/library/dn456880.aspx
The SQL server PowerPivot System Service and SQL Server Reporting Services Service are installed and running on our App server. have the PowerPivot feature activated on the site collections, but still can't get PowerPivot to work. When we go to Central Admin under manage service applications and clicking on our PowerPivotServiceApplication. We get this red X in the Workbook Activity box. If we refresh the "Infrastructure - Server Health" box we get the error "External Data Refresh Failed. An error occurred during an attempt to establish a connection to the external data source. The following connections failed to refresh: Data".
We looked at this site for solutions to the red X error. http://www.sharepoint24x7.com/2014/06/04/article-fixing-powerpivot-management-dashboard-errors/ We confirmed that the App Pool service account has all the correct permissions.
Not sure where to look next or what to try to fix this. We also have a Dev environment with PowerPivot installed and working (prior SharePoint admin installed it and configured it). We have tried to mirror the setting off the working environment to the Prd environment. Pretty much everything is the same config, but still not working.
Please help!