We have a SharePoint system for Power View, and it was working before the holidays but stopped working after we come back to work today. We have not changed anything in the setup, so we thought there may be something in the system changed that we were not aware of. We are not sure where to start since we don't know what the possible causes are. We'd really appreciate any help to troubleshoot the problem, where to start and what to look for.
Our system setup is below:
SharePoint 2010 on Windows Server 2008 R2, SP1
SQL Server 2012 also on Windows Server 2008 R2, SP1
The users are on the same domain as the SharePoint and SQL Servers.
We create all of our reports based on PowerPivot workbooks (not analysis tabular modules)
I've checked that Analysis Service is running and users have admin access to Analysis Services, and the users have access to the data sources in the PowerPivot workbooks.
Appreciate any help that would help us troubleshoot the problem or point us to the right direction.