Update: Check out the Pomodoro Windows App that makes it easier to set custom presence states
I love custom presence states. Being able to tell my peers what exactly I am doing is something I find valuable. You can be busy in so many ways, during workshops being available for short chats, but not phone calls. During Pomodoro sprints where I want to be unavailable, but tell everyone that I am focusing so please don’t call me.
I wanted to set this in my Skype for Business installed through Office 2016. Turns out that the registry settings has changed and the new path is
HKLM:\SOFTWARE\Policies\Microsoft\Office\16.0\Lync
I have updated my script at Technet Gallery to set custom presence state registry settings for Office 2013 and Office 2016. Check out my latest blogpost on how to use it here
msunified.net 
Thanks a lot, man! Love it!
Yes I am also thankful. Very good hints and ideas. I updated regedit and it worked very fine for Office 365 and Skype for business 2016
Thank you, very helpful. I modify myself in regedit, and had great usage on what you wrote you your codes. It works very fine for Office 365 and Skye for Business 2016. Thank you again
Hello
my Windows image doesn’t allow me to execute scripts. Is there a manual method to do this ?
You can try the windows app linked at the top of the blogpost. This avoids needing admin rights to the registry.