[SOLVED]No background option available

[Burn Zero]

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.

[#2]

FYI, I have achieved what Microsoft tech community cannot answer and I am posting this in public interest.

I resolved it by deleting the following registry key:

HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\office

Restart Office application.