Hi IT_dude,
Not from what I can see - at least not securely, as I gave it a quick go and it would appear that Instant OS doesn't support LDAPS (at least not as of 6.5.4.2).
If you're running NPS (or most any other RADIUS product), then it's a trivial matter to achieve what you're looking to do using NPS instead.
Cheers,
Lain