Not receiving Out of Office reply

I have a user using POP3 to access work email. To configure the Out of Office Assistant we have them log into their OWA account. After I watched the user set up the Out of Office Assistant correctly, we can only receive internal replies. i.e. I sent her an email from two different accounts and i didn’t receive an out of office reply.

I’m trying to figure out what is going wrong and needing to fix this as soon as I can.

Any help would be great 🙂 Any ideas? Thanks!