Hello. I am currently trying to troubleshoot an issue with Microsoft Exchange server and I believe it is version 5.5. It's running on a Windows 2000 Small Business edition server. The Exchange server is used for internal email only.
The problem is that with a few people, when they use their external POP3 email through Outlook, sometimes when someone replies back to the email, it uses the senders internal email address. So for example, if someone from their office emailed me, my POP3 ****@shaw.ca email address, I hit reply and often it is that senders internal address "email@example.com".
Any ideas on how to fix this as I have looked through a number of Microsoft's posts and other forum posts from google searches and I can't find anyone that has this issue.
I'm starting to think that perhaps the problem is with the workstation being used. My theory is that for whatever reason, at random times, the Outlook sends the email from both an internal and external account.
It has me baffled though on how this would even happen. Has anyone experienced something like this before?
Should I reinstall the accounts on that workstation, reinstall Outlook or even the user's entire profile?
On a side note, the exchange server version is Exchange 2000 and I just installed SP3 on it.