iis 8.5

Hi Folks,

New to Drupal and I'm having a problem with clean URL's in a multisite setup.
Details:
-Server 2012 R2, IIS 8.5
-Drupal 7.38
-MySQL

I can create a blank dummy site and no issue enabling clean URL's.
However on the multisite setup I have no luck.

The physical file path is as such:
C:\inetpub\wwwroot\"drupal"\sites with all the individual websites in the "sites" folder.

In IIS all the subsites have individual sites that physically point to the parent (C:\inetpub\wwwroot\"drupal")

Does anyone have experience configuring Drupal 7.x on IIS 8.5? We're moved the site from an older server (IIS 7.x).

Drupal site comes up, we can browse all content, but can't edit or add.

Admin user can open Admin Overlay pages, but cannot save any changes (save button just re-writes the overlay page). Edit content opens edit Overlay page, but has not content.

We're not getting any errors in either php or application logs.

Also, how do you handle the URL re-write, it does not seem to be available in IIS 8.5, we had to remove that "bit" from the site's web.config file.