Integration of User Identifiers

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. The first user identifier, the second user identifier, the first account identifier, and the second account identifier are stored in a virtual profile to link the first and second user identifiers and facilitate retrieval of information associated with the first and the second user identifiers from a selected one of the first enterprise and the second enterprise.