How to automatically archive or move deleted items

Many organizations have policies that automatically deletes deleted items after a period of time. How can you as a Outlook user circumvent this limitation?

Many Outlook users use their deleted items folder as an archive of previous threads. Often it can be hard to know what to archive and what to delete. As a result everything is archived in the deleted items folder.

I know of two ways to work around this issue.

1. Configure archiving of your deleted items folder to a local PST file.
2. Run programs like Auto-Mate to automatically move items from your deleted items folder to another folder in your mail system.

The downside for both proposed solutions here is that it is client-side, whereas the automatic delete is server side. If your client is offline for more than the retention days you will loose your valuable mails archived in deleted items.