I have just finish installing Exchange 2010, I have created some Email address and now users can received email from administrator and administrator can receive email from user. But when users are sending email to each other, I am getting an error that user
email id is invalid.
you send an email from the administrator account for two users like User-A and User-B, both received the email and both can reply back but they cannot send to each other? what the error exactly and what client application are you using outlook, OWA ...
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