Microsoft 365 Apps (previously known as Office 365) has multiple update channels.
How can I force Outlook to install the latest updates? I chose File-> Update Options-> Update Now and I got the message “You’re up to date!”
When I compared my build number of Outlook 2016 to the one of a friend, I saw that his was newer. I sometimes see announcements about new features being added or fixes being made to Office 2016.