A system for synchronizing account names from a plurality of source security systems. In response to coupling a conversion system between the plurality of source security systems and a target security system, identity data from a human resource system and account data from the plurality of local source security systems is loaded into the conversion system. A name resolution rule set is retrieved and a unique account name identification is generated for a set of account names associated with an identity using the name resolution rule set. The set of account names associated with the identity is converted to the unique account name identification to produce a synchronized set of account names associated with the identity. Then, the synchronized set of account names associated with the identity is stored in the target security system.