Using older versions of Outlook for Mac for personal email and calendar
Sorry - I have my automatic updates turned off but I get notified when there are new updates to install.
You don't need the Automatic updates. You can manually download and install the update posted on Microsoft's website.
The individual installers and updaters are here for 16.64 (non-app-store version I assume) https://docs.microsoft.com/en-us/officeupdates/update-history-office-for-mac