I am currently trying to implement custom error pages in our SharePoint project.
Here is the issue I have: The custom error pages are set up in IIS. I'm using the .Net error pages in ISS7 for the error code 500. I also use the standard IIS error pages for the error codes 404 and 403.
This works fairly well as they do redirect to the correct page which is a SharePoint page.
However, I have login issues when I setup it up like this. I keep getting login prompt even thoough my account is correct. When I remove all the error management described above it all works fine, no more login errors.
Thank you ;)