Our end user had created a non inventory item with an incorrect expense account. That item is used in multiple transactions and the period has been now closed. Changing expense accounts on those items requires us to reopen the closed period. What is the best course of action?

The best cause of action depends on what is acceptable to your business.

if you don't want to reopen the Etc periods it might be complicated.. Create a journal entry to impact the good account or Maybe you can try to Merge the wrong account with the good account ( don’t know if it’s working in your case )

@Marc that is what I had suggested to finance. Just wanted to make sure if that is the optimal approach.

get those incorrectly configured items disabled/replaced while waiting for answer from finance.