1. An identity mapping system, comprising: an identity mapping database; an access log including first user data related to user access of a first software application and second user data related to user access of a second software application, wherein the first software application is different from the second software application, and the first software application and the second software application are individually associated with respective users; and a master user table (MUT) communicatively coupled with the identity mapping database and the access log, wherein the MUT includes a first record having a first record data field, a unique user identification (ID) field and a first user data field, the first user data field containing the first user data from the first software application, and a second record having a second record data field different than the first record data field, the unique user identification (ID) field and a second user data field different than the first user data field, the second user data field containing the second user data from the second software application.