The Post Open Balances to Accounting process posts each Open Balance to the customer's account but does not post to the General Ledger. Remember to first run the "Print Open Balance Proof Report" (6.8.2) before posting.

You may set an Accounting Period as Open or Closed through “General Ledger Setup” in SYSTEM MANAGEMENT (10.2.3 field 9). If you try to post to a period that is Closed, an error message will be displayed and posting will stop. An example of the error message is:  "99/10 is a Closed period. Please open before using."