Choose ownership for each important field or action, not just one winner for the entire integration. Two systems can share data without both being allowed to overwrite every value.
Prepared with AI assistance. These are practical scoping recommendations; examples are illustrative, not client results.
Map the business authority
Identify where a value is originally decided and who is responsible for correcting it. A CRM might own a sales contact while an operational system owns job status. Record these rules in a field-level map. Avoid using whichever system updated most recently as an accidental substitute for a business decision.
Define permitted changes
Some fields may be copied one way, while others require a request back to the owning system. Explain this in the user interface so staff understand why a field is read-only or awaiting review. A technical ability to edit data does not establish authority to change it.
Resolve conflicts explicitly
Describe what happens when both sides contain different values. The answer may be an ownership rule, a review queue, or a deliberate merge. Preserve enough context to see which records and changes were involved. Silent overwrites can conceal a disagreement until it affects customer work.
Test a disputed record
Change the same business information in both systems and inspect the outcome. Confirm that the result follows the documented rule and that staff can understand it. Then test a correction in the owning system. The integration should make authoritative information dependable rather than distribute inconsistent copies more quickly.