Hi Dear , i have 3 Server Exchange 2010 , one CAS one Mailbox Rolls and One Edge Server .
Now every thing ok , Just i have This Question how Can i Enable SMTP/POP3 to Exchange 2010 for my Client can access them Outlook from Internet .
i Also Enable Pop3 Service on CAS , But when i configure my Information on my Outlook i saw Error JUST ON Receive and Send Was Success .
Here is Receive Error : Log onto incoming mail server (POP3): Your e-mail server rejected your user name. Verify your user name for this account in Account Settings. The server responded: -ERR Command is not valid in this state.