I am running Office 365 Personal and I use the desktop versions of Outlook 2016. Periodically, when I start the application, a banner like the one shown below pops up. I don't want the mobile app because I use a different mobile client (one which is a tonne better than Outlook). How can I stop these messages?

I have searched a lot online and have spent a long time with Microsoft chat support for Office. All the 'solutions' I have found involve submitting a request form to Microsoft, adding an entry to the registry, or adding different registry entries but it seems that these only work if you are running corporate versions of Office 365.
During the support chat with Microsoft the Level 3 agent (giving advice via the Level 1 agent I was connected to) allegedly said that this couldn't be turned off in the Personal version of 365, but running Outlook in Safe Mode did stop the messages, which suggests there is a way to do it in the registry somehow. I have also tried running Outlook normally with ALL the plug-ins disabled, but it made no difference.
I really hope there is someone out there who has found a solution for this as it really bugs me.
Thanks,
Angus

