Hi Diane - Thank you for responding.
Up until Friday, she was the only one using the e-mail account and she had it set up on her computer at her home office only. She was off on Friday morning so another one of our agents logged in at the server level, using Squirrel Mail to check her e-mails and address anything urgent. It seemed at that point, the e-mails started disappearing both on the employees computer AND off the server, very strange.
On Friday night, I did set up her e-mail on my computer as a test. It is still set up there.
We all have IMAP accounts setup and e-mails are always saved at the server level as well. We often login at the server level to check other e-mail accounts when necessary and have never experienced this issue.
I contacted our server company, LunarPages, and they are not finding a reason for this on their end. I tried to research on line and did find that people were having similar issues with Outlook 2013, but it seemed the posts were related to Exchange accounts, which we do not have.
I had my employee uninstall and reinstall Outlook 2013 on her computer and the same thing started happening again. Have you seen this problem before? I am completely stumped and do not know where to go from here. Thanks so much for your help!