Steps to reproduce
Upgrade magento 1.7.x to 2.0.x with migration data tool from ubertheme.
All is ok.
When I try to login with any customer email and password I got "Invalid login and password.", but in the old store, the same customers working perfectly.
Solved! Go to Solution.
I don't think that is a bug in the "migration data tool from ubertheme" because for some accounts I can log in, but in other ones still I got "Invalid login and password".
I check the password_hash field from table customer_entity and for the accounts where I can log in, the password look like "db2408d6bc4c99ea09baf9701f241886P:0" instead for the accounts where I can't login password look like "db2408d6bc4c99ea09baf9701f241886:0", but I don't know if that is the problem.
I got another solution and very quick and easy
Just Empty the table (TRUNCATE) " customer_entity_varchar "
sure login old customer in New magento 2