I am using Outlook 2007 at work. I don't use autoarchive, but archive manually, separating emails into months. I have some "straggler" emails that didn't get archived within those months - how do I get them archived? Thanks!
You can archive those emails by selecting them (searching if you want to filter them out by date, etc) and manually adding them to an archive folder.
For example, open up Outlook and search for emails in a month date range, select all those that you'd like to archive, and add them to your monthly archive folder.