[AUTHENTICATIONFAILED] (#MBR1212) Incorrect username or password - Error

Error:

[AUTHENTICATIONFAILED] (#MBR1212) Incorrect username or password.
 

Cause:


This error occurs when migrating from Yahoo IMAP and Yahoo is blocking our sign-in attempts 

Troubleshooting Steps:

 In order for MigrationWiz to be able to access the Yahoo mailbox, the Yahoo account must have Allow apps that use less secure sign-in turned on.
To turn this setting on, users will have to:
  • Log in to the Yahoo mail account.
  • Click on the account name and select Account Info.
  • Click on Account security.
  • Confirm that Allow apps that use less secure sign-in is enabled.​
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