[SOLVED]No background option available

Hi,

 

I am an O365 user and I have signed in using my O365 licensed email id to outlook and other Office programs.

 

Office365 version I use:

 

 

But I don't see the background option where you will be able change the background of title bar.

 

Please check the screenshot.

 

 

I have already set the following registry keys to 0

 

HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\office\15.0\common\general - disablebackgrounds to 0
HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\office\16.0\common\general - disablebackgrounds to 0

 

And I still don't see the background option. How else to enable that option?

 

Thank you.