Active Directory Password Sync Products

I have a product which has its own repository in SQL DB and it has its own set of users. I would like to synchronize the SQL DB passwords with that of the corresponding Active Directory passwords.

Could anybody suggest me the popular products or tools available for this type of synchroniza开发者_如何学运维tion?

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I don't think that it is possible to do what you are asking because in order to do this you would need to be able to decrypt/read the windows passwords and given that they are "hashed" this type of thing is impossible.