Interface Changes

Adding Toms answer from previous post of same topic:
---
You have the following options available OOTB:

1. If you are using SSO, you can use the IdP login page. This is configured via the Admin Console.
2. If some users are always using Appain authentication, they can access the Appian login page at /suite/portal/login.jsp
3. You can create a custom servlet and use that URL for a different purpose. If necessary you can add the servlet URL to the whitelist so that users can access it before they log in.

Depending on your requirements you may be able to configure something different with URL redirects, but that would be configured at the web server layer.

Note that the base URL should always be the same one configured in the SERVER_AND_PORT setting in custom.properties.
---

Have you looked at the branding section on admin console forum.appian.com/.../Appian_Administration_Console.html

or if you're using sites forum.appian.com/.../Sites.html