Exactly! Glad you have gone this far, I expected a few more posts. Don't forget to check this option on his computer as well, otherwise if he receives a new email earlier than you, you won't get it.

One more thing to note: The emails will be kept on the server, so what's the best time to remove them? If this is a temporary task, after you finish it, simply remove his email account from your Outlook, uncheck the 'keep copy on server' option on his computer; if this is a ongoing task, you need to figure out a way removing these accumulated emails on the server, one way to do is checking the option 'Remove from server after x days'.