This option was rolled out a few weeks back and worked great. All of a sudden the option just went missing. No update on the UV page so not sure if something broke or what. Does anyone know anything about this? I had the checkbox on my machine and when I checked yesterday, the box is gone.
It was not intentional to turn off the new feature. We've taken a look and made sure the feature is back on for everyone who had it before - Office365 subscription customers on Monthly Channel (Version 1803 or newer). Users will need to restart Outlook, up to 3 times, for the feature to be re-enabled.
Mike, can I ask you to reply back and confirm if this is now working for you as before?
Apologies to anyone who was affected by this; thanks so much for reporting!