Abstract: A method and system is provided for implementing a quorum based access control mechanism for modifying at least one database attribute in a database. The database is managed by a network directory service. Upon a request of an initiator, the network directory service establishes one or more quorum attributes for defining the quorum based access control mechanism. The quorum attributes provide one or more authorized users who have rights to participate in a quorum for accepting or rejecting a modification request. When a modifier initiates a modification request, he proposes a value to modify the database attribute. The modification request is granted and the database attribute is changed to the proposed value if a quorum as defined by the quorum attributes is reached.