See the Oracle document "JD Edwards EnterpriseOne 64-bit Processing Frequently Asked Questions (Doc ID 2390692.1)"
Q: What is the impact to JD Edwards business processes?
A: There is no impact to JD Edwards business processes or business data. Transitioning to 64-bit processing is a technical uplift that is managed with the JD Edwards Tools Foundation.
Q: What is the impact to integration to JD Edwards?
A: There should be minimal impact to integration to JD Edwards and third-party solutions. However, depending on how these solutions were developed, there may be some work to transition the solutions to be 64-bit compliant. Oracle will deliver guidance on how to uplift integration.
Q: How are customizations impacted if I transition to 64-bit processing?
A: There is no impact to spec-based objects such as interactive applications, UBEs, NERs, and other spec-based objects. C business functions will need to be retrofitted for 64-bit. To simplify the retrofitting, Oracle will deliver a utility to assist with the conversion of C business functions to be 64-bit compliant.
Q: When will 64-bit processing be generally available?
A: Oracle is planning on delivering 64-bit with the next JD Edwards Tools Update.