I am proposing an issue on IIS 8 not being compatible with Drupal 8. According to the Drupal.org System Requirements, "Drupal core will work with IIS 5, IIS 6, or IIS 7 if PHP is configured correctly" (February 9, 2017). Drupal's system requirements does not state that IIS 8 runs with Drupal. I have tested running Drupal 8, specifically 8.2.6 (8.2.7, & 8.2.0) on IIS 8. When trying to install Drupal 8.2.6 the following occurred: after selecting 'save and continue' from 'database configuration', I was redirected back to the 'database configuration' page. There were no errors displayed, just being redirected back without having the chance to install. Therefore it looks like a compatibility issue among IIS 8 and Drupal 8.2.6. Otherwise the program would have been able to install proficiently as Drupal 7 installs with IIS 8 (using My SQL and MSSQL).
Below are links of other users that experience the same issue using Drupal 8 with IIS8.
The link below displays a user constantly getting redirected to the log in page.
The link below displays the System Requirement.
I have seen a user that installed Drupal 8 using IIS 7 (with no errors). I just needed to report this issue because it is a new install in which, I tested among multiple variations. It should not occur.
The way I configured Drupal, and IIS 8 was the same as the link below. Only difference is I used IIS 8, and the tutorial uses IIS 7