I have been reading about the Sharepoint driver, and there is something
I do not understand.

What does Sharepoint use that is different from Users and Groups, that
we need a driver for.

I figured this info would be in the driver docs, but alas no.

I have been going through adding comments like mad as I read through the
4.0 docs, so I will see if anything comes of that...

But since that is indeterminate, so does anyone understand Sharepoint
and how the driver interacts with it, that could explain it here?