Will this software be able to recover partitions located on a RAID disk array in Windows 2008 Server?

Yes, provided that the RAID disk array is not damaged and is visible to the operating system on a physical level.

If you only have logical problems with a volume structure (partition information was deleted or damaged) as far as the software is concerned there is no difference between a Local Disk, RAID Disk Array or kind of a Virtual Device (e.g. a VMWARE disk image).