@Mike-Davis said in IIS / RDS 2012 R2 User's Can't Log On:

What does the IIS log say?

IIS Shows no errors. I see the POST where the login attempt is made, and then it 302 Redirects to Default.aspx and then it 302 redirects back to the login page.

2017-05-12 12:34:53 x.y.z.a GET / - 443 - a.b.c.z Mozilla/4.0+(compatible;+MSIE+7.0;+Windows+NT+6.3;+WOW64;+Trident/7.0;+.NET4.0E;+.NET4.0C;+.NET+CLR+3.5.30729;+.NET+CLR+2.0.50727;+.NET+CLR+3.0.30729;+InfoPath.3) - 304 0 0 218 2017-05-12 12:34:56 x.y.z.a GET /RDWeb/Pages/ - 443 - a.b.c.z Mozilla/4.0+(compatible;+MSIE+7.0;+Windows+NT+6.3;+WOW64;+Trident/7.0;+.NET4.0E;+.NET4.0C;+.NET+CLR+3.5.30729;+.NET+CLR+2.0.50727;+.NET+CLR+3.0.30729;+InfoPath.3) - 302 0 0 15 2017-05-12 12:34:56 x.y.z.a GET /RDWeb/Pages/en-US/Default.aspx - 443 - a.b.c.z Mozilla/4.0+(compatible;+MSIE+7.0;+Windows+NT+6.3;+WOW64;+Trident/7.0;+.NET4.0E;+.NET4.0C;+.NET+CLR+3.5.30729;+.NET+CLR+2.0.50727;+.NET+CLR+3.0.30729;+InfoPath.3) - 302 0 0 0 2017-05-12 12:34:56 x.y.z.a GET /RDWeb/Pages/en-US/login.aspx ReturnUrl=/RDWeb/Pages/en-US/Default.aspx 443 - a.b.c.z Mozilla/4.0+(compatible;+MSIE+7.0;+Windows+NT+6.3;+WOW64;+Trident/7.0;+.NET4.0E;+.NET4.0C;+.NET+CLR+3.5.30729;+.NET+CLR+2.0.50727;+.NET+CLR+3.0.30729;+InfoPath.3) - 200 0 0 203 2017-05-12 12:35:10 x.y.z.a POST /RDWeb/Pages/en-US/login.aspx ReturnUrl=%2fRDWeb%2fPages%2fen-US%2fDefault.aspx 443 [email protected] a.b.c.z Mozilla/4.0+(compatible;+MSIE+7.0;+Windows+NT+6.3;+WOW64;+Trident/7.0;+.NET4.0E;+.NET4.0C;+.NET+CLR+3.5.30729;+.NET+CLR+2.0.50727;+.NET+CLR+3.0.30729;+InfoPath.3) https://sk_dev.gcsu.edu/RDWeb/Pages/en-US/login.aspx?ReturnUrl=/RDWeb/Pages/en-US/Default.aspx 302 0 0 156 2017-05-12 12:35:10 x.y.z.a GET /RDWeb/Pages/en-US/Default.aspx - 443 - a.b.c.z Mozilla/4.0+(compatible;+MSIE+7.0;+Windows+NT+6.3;+WOW64;+Trident/7.0;+.NET4.0E;+.NET4.0C;+.NET+CLR+3.5.30729;+.NET+CLR+2.0.50727;+.NET+CLR+3.0.30729;+InfoPath.3) https://sk_dev.gcsu.edu/RDWeb/Pages/en-US/login.aspx?ReturnUrl=/RDWeb/Pages/en-US/Default.aspx 302 0 0 15 2017-05-12 12:35:10 x.y.z.a GET /RDWeb/Pages/en-US/login.aspx ReturnUrl=/RDWeb/Pages/en-US/Default.aspx 443 - a.b.c.z Mozilla/4.0+(compatible;+MSIE+7.0;+Windows+NT+6.3;+WOW64;+Trident/7.0;+.NET4.0E;+.NET4.0C;+.NET+CLR+3.5.30729;+.NET+CLR+2.0.50727;+.NET+CLR+3.0.30729;+InfoPath.3) https://sk_dev.gcsu.edu/RDWeb/Pages/en-US/login.aspx?ReturnUrl=/RDWeb/Pages/en-US/Default.aspx 200 0 0 0

Makes sense. Although I am a little worried that the new pool just died all by itself. I wonder why that would happen. Will see if it happens again.

OMG, nevermind. Figured that out too. Was a combination of a missing default path and the same .NET CLR pool version as before. It's a subfolder and needs its CLR version set, too. Argh. All is well now.

If you want to use a newer version of .Net, I generally tell it to use whatever version I want and the "Classic" version if it is listed. I've had problems similar using any other version.