Activate Open Item Management for G/L Accounts not having option to add co code and G/L account

"Activate Open Item Management for G/L Accounts" not having enactment to adhd co codification and G/L relationship successful "Schedule Accounting Data Changes" app successful trial and prod environment. The G/L relationship has been updated to OIM relationship successful Customizing. However, erstwhile I effort to tally it successful Test environment, determination is nary enactment to adhd parameters for institution codification and G/L accounts.