Disable SignIn Button on Office 2016

The above screenshots are from Office 2013 and just to give you an idea.

Microsoft Office 2016 - Disable Sign In Button

Unlike Office 2013 (version 15.0), the registry no longer has a SignIn entry to change the Sign In button.
It's not a problem and the solution is very similar to previous versions.

Open the registry:
Click Start > Run > regedit.exe

Click your way to:
HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\ (Note: 16.0, not 15.0)

You will see NO entry named "SignIn" unlike previous Office versions...
So do the following:

Right click on "Common" entry. (HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\)
Create a new entry. Select New > Key & rename it as "SignIn" (Case sensitive).

Enter the "SignIn" entry & right click the right panel, on the screen.
Create a new entry. New > DWORD (32-bit) Value & rename as "SignInOptions" (Case sensitive).

Double click "SignInOptions" & enter the value 3 & click OK.

Close down & Restart PC... Should be gone!

If this helps, then great.
If it doesn't help or you have a stupid, mean comment... Please, keep it to yourself. It just makes you look stupid, not me.