When generating reports with TMG 2010, the report may be produced successfully, but no data is contained in the various report sections.

To resolve this either:

1) Change the language
- Set the language under Control Panel | Region and Language | Formats to English (United States)
- Restart the SQL Server Reporting Services (ISARS) service

2) Apply SP1
- Apply Forefront Threat Management Gateway 2010 Service Pack 1
- Restart the SQL Server Reporting Services (ISARS) service
- Run "C:\Program Files\Microsoft Forefront Threat Management Gateway\DailySum.exe"

Reports should now generate correctly.

Note: The current date cannot be selected, so ensure there is data available from the previous day for the report, or temporarily advance the date.

Microsoft Forefront Threat Management Gateway (TMG) 2010 Service Pack 1
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=16734

Software Update 1 for Microsoft Forefront Threat Management Gateway (TMG) 2010 Service Pack 1
http://support.microsoft.com/kb/2288910

Troubleshooting reporting
http://technet.microsoft.com/en-us/library/ff849731.aspx

Software Update 1 rollup 1 for Forefront Threat Management Gateway (TMG) 2010 Service Pack 1
http://support.microsoft.com/kb/2433623

Software Update 1 Rollup 2 for Forefront Threat Management Gateway (TMG) 2010 Service Pack 1
http://support.microsoft.com/kb/2475183

Software Update 1 Rollup 3 for Forefront Threat Management Gateway (TMG) 2010 Service Pack 1
http://support.microsoft.com/kb/2498770

Software Update 1 Rollup 4 for Forefront Threat Management Gateway (TMG) 2010 Service Pack 1
http://support.microsoft.com/kb/2517957