If you don’t have a previously set up archive folder for an email account, you will get a prompt:
Common Problems Encountered With Respect to Archiving Email in Outlook for Mac 2016 will appear in the same location as they appeared in Mac 2011. Imported items such as mails, contacts, calendar items, notes etc. “Import from here” is the default location.”Import from another location” allows you to browse your Mac for identity.