Browser Logon Page Customization

We had just opened a Case for this one. Here's the official answer:

• Navigate through the flyout to Access Policy-->Customization-->Advanced.
• Under the Properties Editor, you'll see an "Edit Mode" dropdown at the top. Click that and select Advanced.
• Navigate to Customization Settings/Access Profiles/%YOURPROFILENAME%/Common.
• Click to highlight the apm_full.css entry.
• Under the Advanced Customization Editor in the right pane, you'll want to click within the text and perform a [CTRL] + [F] in your browser. Search for the first occurrence of the word background-image.
• Comment out the entire line by inserting /* to the beginning of the line, and */ to the end.

BEFORE: background-image: url(/public/images/my/header-transient.png); AFTER: /* background-image: url(/public/images/my/header-transient.png);*/

• After this, keep using the Find function to locate and comment out every line referencing background-image. As of the 11.5.1 code level, you'll do this a total of 4 times. Your results may vary with other code levels.
• When you have completed, click the [Save Draft] button at the upper right, click [Yes] to confirm, then click [Save] at the top to commit the changes to the CSS file.
• [OPTIONAL] Perform the steps above to comment the entry from any other CSS files you wish to modify, such as apm_mobile_ppc.css, apm_mobile.css, etc.
• Once you have completed all edits, you may now Apply the Access Policy by clicking the Apply Access Policy link at the upper left and following through the necessary steps.

I hope that helps, everyone! Feel free to mark this as the answer if this helps!

-Cory