Issue while opening excel file "Security Alert - Office File Validation"

[GoogleCodeExporter]

What steps will reproduce the problem?
1. When I run the code from Visual Studio it's working fine. The file is 
opening without getting any validation alert.
2.But when I publish the code into server and tried to export the file and 
while opening that file, It is giving the validation error.
3.I attached the screen shot of the error.

What is the expected output? What do you see instead?
I expected the file should open without asking file validation.

What version of the product are you using? On what operating system?
The latest version of DLL in Windows Server 2012.

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 27 Jul 2015 at 8:10