Hi GibsonW
Thanks for your post. Changes to transactions can be traced in the Journal Security Audit report (Reports>>Accounts>>Security and Audit). If you have an idea when the linked accounts were changed you can check the Session Security Audit report to see who was logged on at that time.
You could also check which users have the permissions to make those changes: Manage users
Please don't hesitate to post again if you need help in the future.
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