If you’re getting this error message when navigating to the main EIOBoard site for your on-premise server, the most likely issue is that the firewall/domain is trusting the default documents but not allowing a redirect from them. You can double check that it’s this issue if going directly to <Servername>/login.aspx does work for you. If it doesn’t work at all, make sure Windows Authenication in the Browser is set up properly, including having the site added to the computers local internet.
If going straight to /login.aspx does work, this issue can easily be accounted for by just adding the the login.aspx page to the Default Documents of your website.
1. Open IIS
2. Navigate to the EIOBoard Site
3. Under the IIS section, open ‘Default Document’
4. Add Login.aspx