There was a time when archiving email meant taking a few Megabytes of data away from the restricted space within your mailbox, and possibly storing it for posterity in an a PST file on your PC, where the mail would stay until eventually the file is either corrupted or deleted with no backup being taken first, whichever inevitable event happened first.
Thanks to Moore’s Law, mailbox capacity is now less of a constraint. Having too much clutter and the distraction that it causes is a more pressing issue than not having enough space.
There are tools – some mythical and magical – to reduce volumes of unnecessary emails, and automatic processing via features like the Focused Inbox or Clutter can help to filter out stuff that is getting in the way, but fundamentally the decision on whether to delete, defer, delegate or just leave it lying about, rests with the user.
There is still an AutoArchive function in Outlook, but you probably don’t want to use that.
Instead, look at the simpler “Archive” feature, which is available for Microsoft 365 users and appeared first in the web client before making it into desktop Outlook. If you haven’t used the Outlook Web App for a while, it’s worth having a look since it has evolved massively over the years, and often leads the way for new functionality and integration, compared to its desk-bound precursor. There is a view that eventually, the web client will replace Outlook on the PC.
If the Archive option shows up in the web UI (with suitable icon), the folder should also be visible in desktop Outlook in the main folder tree. Just like you have an Inbox, Drafts, Sent Items and so on, it will have been created for you but you may need to expand the view to locate it. And no, you can’t rename it…
Check out the Archive folder properties, and you can see its size on your own machine or on the server (assuming that you’re not storing everything in your mailbox within your Outlook cache).
To fire an email into the Archive folder from the desktop Outlook client, just press backspace if you’re currently viewing the message in the preview window. The default shortcut key to archive a message in Outlook Web App is E though you can reconfigure the app to use different shortcut schemes, in case you’re more familiar with other web clients. To see the shortcuts in Outlook web app at any time, just press the ? key.