I found this information about moving emails from server to outlook.
Our company would like to move some mails from our server to outlook to free up some space.
We using IMAP.
I couldnt find any information about IMAP.
"If you are using POP account you cant synchronize the folders it would only sync Inbox folder. However you may try following steps to delete mails from server when you delete them in Outlook.
1. Click on FILE>Account Settings>Account Settings.
2. Double click on the email account and press More Settings.
3. Go to Advanced tab
4. Check Leave a copy of messages on the server and Remove from server when deleted from 'Deleted Items' options."