I have a question, I know it's possible with third party applications... We currently have 3 people outside our company network with company email addresses, they like to have their emails forwarded to their personal email account. The problem we have is spam keeps getting forwarded there without being filtered, and gets us on blacklists for sending spam. I finally got the spam thing under control, but I want to force them to use the company email via OWA rather than have emails forwarded to their home personal accounts. Is there a way to simply forward something to their personal email saying "new mail is waiting at mail.xyz.net, please log on to receive it" instead of forwarding the whole email to them as a way to force this changover? Three of the six people complied with my switch over, and the other three choose to ignore it by not returning my emails or calls. I don't want to cut it off completely because they wouldn't get their important emails.