Users are getting too many redirect errors on IIS 10 returning 200 and 302 errors suddenly after working for years. The website has worked since 2018 sine Windows Server 2019 came out.The issues started a couple of weeks ago about the time of the AT&T outage. Nothing has changed. The only workaround is clear the cookies and remove the history for the subdomain.

We have links on our public site that link to our private site. You should be able to login, and then be redirected to the page. At first I thought it was a redirect error but since nothing changed, I decided to test logging directly into the private site. It didn’t work at first. I cleared cookies and history and it works. What I figured out was that if I went from the public site which has the same link to the private site is when I got the error “too many redirects.” The log files all show that one of two different errors, either 302 or 200 errors mostly 302.

Some of the time it will redirect me to the login page and then to the portal. Other times, have to clear cookies and history.

Sample error:
2024-08-01 00:29:07 10.50.1.4 POST /forms/search.aspx – 443 – 76.150.129.67 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/127.0.0.0+Safari/537.36 https://iis.domain.org/forms/search.aspx 200 0 0 53

I tried iisreset, rebooting the servers and gateways. I cleared every temp file and cache on the server. I even changed the IP of the server and then changed it back. No changes.