Install Mobile Locker in New Outlook
If you're not sure which Outlook you have, start here. Here’s a step-by-step guide on how to install Mobile Locker in New Outlook.
Click the More Apps button in the sidebar.
Click Add Apps.
Search for Mobile Locker, then click Mobile Locker for Outlook.
Click Add.
Click Got it.
After it installs, close Outlook by closing all of its windows. It would be best to close all Outlook windows, or it will not work correctly.
Reopen Outlook.