Article ID: 2963388 - View products that this article applies to.
Microsoft SQL Server 2012 Reporting Services (SSRS) may fail to export a report to Excel format if the exported file is larger than 10 megabytes (MB).
Service pack information for SQL Server 2012To resolve this problem, obtain the latest service pack for Microsoft SQL Server 2012. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/2755533/ )How to obtain the latest service pack for SQL Server 2012
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.