Abstract: User identifiers associated with a plurality of enterprises may be integrated. A request is received to link a plurality of user identifiers associated with a plurality of enterprises. A first user identifier associated with a first enterprise is received, and a second user identifier associated with a second enterprise is received. The first user identifier and a first enterprise identifier are stored in a first data structure of a memory. The second user identifier and a second enterprise identifier are stored in a second data structure of the memory. A first account identifier associated with the first user identifier is determined by a processor. A second account identifier associated with the second user identifier is determined by the processor.