We need the ability to add custom HTML formatted text to the login page. This is useful in the following circumstances:
1. Inform users which credentials to use.
2. Inform user when the system is/will be unavailable
3. Branding the Tableau Instance
4.Tell the users how to get support if they cannot login successfully.
I am the manager of my organizations BI application platforms. Right now we have to edit and replace the login.html page with one of our own which has added html. Our approach is unsupported, and can break with any upgrade.
This is the only way to gently handle the user's questions/difficulties during log in. Absent this, the user has to magically know what to do at the login page, and where to go when what they expect doesn't happen.