Adobe Reader XI (11.0.08) doesn't create thumbnail (bitmap) using Microsoft Interface IExtractImage --> Extract on Windows Server 2008 R2, when exe to generate thumbnail is launched from Windows service.

Adobe Reader XI (11.0.08) doesn't create thumbnail (bitmap) using Microsoft Interface IExtractImage --> Extract on Windows Server 2008 R2, when exe to generate thumbnail is launched from Windows service.

But if exe is launched as standalone, then interface IExtractImage --> Extract, gives Bitmap to generate thumbnail of PDF document.

Above problem occurs only for PDF documents, if we tried same with other software like CAD -CATIA it works without any problem.

Is there any security concerns form PDF side, which doesn't allow to generate Bitmaps, if exe to generate it is launched form Windows service.