Trello – Synchronize Trello accounts with Active Directory or LDAP

Is there any way to synchronize Trello accounts with Active Directory?

This would not just be a one-time import. I would like passwords to synchronize so that users have single-sign-on. (If users have to remember yet another password, I'm not confident that they will adopt Trello.) I am willing to pay for a plugin or service that does this.

My 35-person company is using Google Apps, and we are heavy users of Trello. Trello can use Google Apps authentication so my coworkers have single sign on to their Trello boards.

Now I would like to roll out Trello to our 1000+-person parent company. However, the parent company does not use Google Apps. They use Microsoft Windows / Active Directory.