After you create the custom background image file you want to use with the PBA login screen, you need to add the custom file to the fsebrand.bin file.
Extract the fsebrand.bin file to a temporary folder. If you already did this in order to get a copy of the pba_bkgd_image.png file (see Section 8.1, Creating a Custom Background Image File), you can use that set of extracted files. Otherwise, complete the following steps to extract the fsebrand.bin file:
On a managed device that has ZENworks Full Disk Encryption enabled (no policy needs to be applied), locate the fsebrand.bin file:
c:\windows\nac\sbs\fsebrand.bin
Make a copy of the fsebrand.bin file and rename it to fsebrand.zip.
Extract the contents of the zip file to a folder to a location outside of the c:\windows\nac\sbs directory.
The contents are extracted to an fsebrand folder.
In the fsebrand folder, replace the default pba_bkgd_image.png file with your custom pba_bkgd_image.png file.
In the fsebrand folder, select all of the files and subfolders, right-click the selected files and folders, then select .
Do not select the fsebrand folder itself, only its contents. Including the fsebrand folder nests the files too deep in the structure.
Rename the zip file to fsebrand.bin.