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TestTrack Cannot Import Mail from Exchange Server 2007
The following error is written to the TestTrack Server log when importing mail from Exchange Server 2007:
'Error importing email. The error occurred sending a command to the POP3 server. Status=0 Addr='mail_server' Account='mail_account' Response code=0 Response string=’ERR Command is not valid in this state.’ Command=’USER’.'
Exchange 2007 Update 4 or later is installed on the mail server. This update changed the authentication properties on the server, which causes the mail import to fail.
Enable plain text authentication on the mail server.