Identity operation error when starting JPP 6 with MSAD

Issue

• During deployment of a custom portal extension which uses LDAP/MSAD, below exception is logged

2014-04-01 13:43:25,377 INFO  [org.exoplatform.services.organization.idm.GroupDAOImpl] (MSC service thread 1-8) Identity operation error: : org.picketlink.idm.common.exception.IdentityException: Attribute name is not configured in this store
    at org.picketlink.idm.impl.store.hibernate.HibernateIdentityStoreImpl.resolveAttributeStoreMapping(HibernateIdentityStoreImpl.java:3165) [picketlink-idm-hibernate-1.4.4.Final-redhat-1.jar:1.4.4.Final-redhat-1]
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2014-04-01 13:43:25,549 INFO  [org.exoplatform.services.organization.idm.PicketLinkIDMOrganizationServiceImpl] (MSC service thread 1-8) IDM error recovery finished. Old transaction has been rolled-back and new transaction has been started