How do you modify delivery settings in Outlook 2016 Professional Plus to save the preferences you want?

I have a client who has a POP3 account in Microsoft Outlook 2016 Professional Plus.  When I try to change his account settings, going to More Settings then Advanced, the default delivery is "Leave a Copy of Messages on the Server" and "Remove from Server After 14 days".  Both of these items are checked.  I have went into this account and tried to take the checks off of both of these boxes as the user doesn't want messages saved to the server.  I can uncheck the boxes and click OK.  It takes me back to the prior screen of which I click on "Next".  A window pops up showing that Microsoft Outlook quit working and then subsequently closes Outlook.  You then launch Outlook again, but the settings are checked again.  Is there a way to get this permanently modified?