Upon suggestion from my friend Erik Schwalb of HCL, I upgraded to FP1 a Sametime12 server where I made some branding customization.
Contrary to what I wrote in my previous post not ALL customizations are kept.
This is a companion discussion topic for the original entry at https://www.robertoboccadoro.com/2022/07/21/updating-sametime-12-to-fp1-not-all-customizations-are-kept/