When I changed jobs last year, I remember having to backup my data file from within Outlook using this freeware tool from Microsoft. However, now in my new job, we use Exchange whereas before, we used IPSwitch Imail with POP3 access enabled for mail clients.
So here's the problem:
(direct quote from the download site)
Note: Personal Folders Backup only backs up .PST files. If you have a Microsoft Exchange Server mailbox, your server mailbox folders are likely backed up regularly by your server administrator.
So to make things easy, here's a how-to for exporting all your data from your exchange mailbox to a regular .PST file which you can later import back into Outlook to access as an archive. The full-res pictures are here.
1. Within your Outlook client, click "File"->"Import and Export"
2. Select "Export to a file" and click "Next"
3. Select "Personal Folder File (.pst)" and click "Next"
4. Select the top-level of you Exchange Mailbox and check "Include subfolders" then click "Next"
5. Type the path and filename for the file to be created and click "Next"
6.Enter a name to be displayed when you add the backup .PST file to the Outlook client. Also, enter a password if you want to protect the file from unauthorized access. Click "OK"
7. Re-enter the password for the system to begin file creation and click "OK"
After this screen, the .PST creation begins. This took about 20 minutes on my mailbox, which was almost 1GB of data.
When the process finishes, you can now copy the newly created .PST file to a CD, DVD, etc. somewhere safe.