Contact Support in Outlook 2016 for Mac is an option on the Help menu.
It opens a dialog box that is pre-populated with your name and email address. Here you can type a message and attach one or more images to explain what you need assistance with.
When you send the message, it goes to the support team for Outlook 2016 for Mac. This option is enabled by default.
If you want to disable the Contact Support option, follow these steps.
On your Mac, select Finder > Applications > Utilities > Terminal.
Type this command, then press the Return key:
Defaults write com.microsoft.Outlook DisableContactSupport –bool TRUE
Completely shut down and reopen Outlook via the Outlook tab. When you select the Help menu, you'll see that the Contact Support option is gone.
To reinstate the Contact Support option, type this command, then close and reopen Outlook:
Defaults write com.microsoft.Outlook DisableContactSupport –bool FALSE