ERROR:(EML1001) - java.mail.AuthenticationFailedException 535-5.7.8 Username and Password not accepted.

Issue: 

ERROR:(EML1001) - java.mail.AuthenticationFailedException 535-5.7.8 Username and Password not accepted

                                                      Fig: Error message

SOLUTION:

This happens when the “Less Secure App” settings is not enabled for your Gmail Account which is configured with DBSync.

Click on the below-mentioned link and enable the “Less Secure App” setting for Gmail Account which is configured with DBSync and then try for the sync.

https://myaccount.google.com/lesssecureapps?pli=1      

                                                 Fig: Enabling the Less Secure App Settings