Is LibreOffice_5.2.2.1_Win_x64.msi a valid package?

…I dont think so.
After validation I got a lots of errors ICE03.
I cannot deploy via GPO:
Add operation failed. Unable to extract deployment information from the package. Run validation on the package to ensure that the package is correct.

Your download may have failed. Try again.

That’s a development version. You should report this at bugzilla, not here.