Hi Rockmdr,
Before moving on, I would like to confirm if the error is related to the Network Solutions email account and it indicates the password is incorrect. During the IMAP migration, we should prepare a CSV File to Migrate E-mail from an IMAP Server. The required attributes are EmailAddress, UserName and Password. Could you please check if you enter correct information in CSV file? You can refer to http://help.outlook.com/en-us/140/ee730334.aspx
Thanks,
Johnny Zhang