How to solve OUTLOOK EXPRESS / MICROSOFT OUTLOOK ERROR CODES-0x800CCC03:

0x800CCC03- USER ALREADY CONNECTED
1. You may be logged in on another machine. Close all connections on all machines, wait 20-30 minutes and try again
2. Some mail servers will not recognise an improper disconnection. This will result in the account being 'Poplocked'. Either wait 20-30 minutes for it to time out or get somebody to shell into the mail server and stop the mail task that is running on the account. This can normally only be done with accounts that have UNIX shells
3. If you are not logged in on another machine or poplocked then someone may be using/downloading from your account or something is wrong with your account

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Best regards,

Ryan S.

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Same problem here!