I have migrated only customers from Magento 1.6.2.0 to Magento 2.2.3 and customers migrated successfully and listed properly in the admin section.
But when I try to login with the Magento 1 password I am not able to login.
So as I check in database the old passwords are stored differently than the Magento 2 passwords.
Here's a screenshot of the database table "customer_entity":
Basically I have found that when customer created from Magento 2 frontend there is a larger string after the first colon :
and migrated passwords have only two character after the colon :
.
Best Answer
"The data migration tool takes advantage of such backward compatibility in Magento to automatically migrate Customer password from Magento 1 to Magento 2. So your customers can use their
md5()
based password without the need to reset their passwords after migration. " Meaning they can log in with their md5 password ? I tried, to no avail.