Anyone know how to save Outlook's stored email addresses to the contacts
folder or to export them?
If you mean the autocompletion cache, then you can use a tool like
http://nk2.info/ to export it and then you can use Outlook's import feature to
pull it in. However, the autocompletion cache will contain the most recent
2,000 addresses you've mailed, which can include misspelled addresses as well.
Review the exported list before importing it into your Contacts folder.