I'm facing a strange issue with one of our clients. The CEO, has his Exchange account and Gmail account configured in Outlook 2013.
Exchange Version: 2003
When he tries to forward an email from his exchange account to the Gmail account, he recieves an NDR saying:
Your message did not reach some or all of the intended recipients.
Subject: FW: Cancer Advance NY Conference May 13-14 Apella New York
Sent: 2/3/2014 3:30 PM
The following recipient(s) cannot be reached:
'User Name' (User.Name@gmail.com) on 2/3/2014 3:29 PM
The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
The user can send emails from his Gmail account and from his exchange account without any issues. And he can send new emails from the Gmail account to the Exchange account, and in reverse without any issues as well