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Outlook Express application present in Windows Vista and its predecessor operating systems helped manage effective email communication. If you are still using Outlook Express, then you may be familiar with its functional aspects. When you open the application, then the default account is opened. Sometimes, the application shows the following error while opening the account-



There can be following possible reasons that make Outlook Express pop up the above error message:

  • You may be logged in on another machine.
  • There may be some problem in mail server due to which the server is having problem in recognizing improper disconnection.
  • In case, you are not logged in to your account then someone else may be using your account.
  • There may also be some internal problem with the user account.


You can get rid of the mentioned error message in following ways:

  • Check if you are logged in on another machine. If you are logged in on another machine, close all connections, wait for 20-30 minutes, and then again try to sign into your account.
  • If there is a problem in Mail server, ask the System Administrator to stop the mail tasks executing on your account from mail server.
  • If there is some internal problem with the user account then wait for 20-30 minutes and then try again.
  • In case, the user account has been crashed or there is some problem with .DBX file then you need to create a new your account.

Above mentioned steps can help you resolve the 0x800CCC03 USER ALREADY CONNECTED error message. However, if you need to create a new user account then you would not be able to access emails, contacts, etc. stored in old user account, which can be a data loss for you. Therefore, before creating a new user account, you should create backup of old DBX file, which you can use to import emails, contacts, etc. from old account to new user account. You can locate the DBX files for backup at following location:

Drive: \Documents and Settings\Administrator\Local Settings\Application Data\Identities\ {40951167-9211-4FD0-A6D3-DAD3F585F9E1}\Microsoft\Outlook Express

After creating a new account, import the DBX files into it and you will get your emails listed in new account.

Outlook Express email recovery is also concerned issue for OE users. To repair outlook express DBX files, users search for outlook express recovery software to recover emails from the corrupt and inaccessible .DBX files. Kernel for Outlook Express helps users in email recovery with original mail structure, attachments, Unicode characters, images, text properties, email properties and every other item present in the email.

Kernel for Outlook Express
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