Authentication details provided was rejected by Source server. Kindly provide valid username and password....

Can you please help. 

I have disabled, Captcha

I have verified email adresss in both user name spots.

I have verified password

I have logged into gmail website

I have opened "pop" and "imap" settings on gmail

I have enabled "less secure apps" in gmail control panel

When I attempt to migrate, I am gettting the " Authentication details provided was rejected by Source server. Kindly provide valid username and password." error.

I have 2 more days before my corporate gmail turns off, can you please help me do this?