I have a person that is using our Outlook Exchange email and he get back the following message:
When I email XXXXXXX@verizon.net this comes back with the message of unknown address--
When I email YYYYY@verizon.net this comes back with the message of unknown address--
I send a test message myself and had no problem. I had him send a test message and he instantly got back the error message. I had him sign onto another computer and the test message went through with no problems. So it seems to be a setting on his computer. Does anyone have any idea where I need to look and how I can go about fixing this problem? I will be happy for any information.