A well established shipping and logistics company, operating for two decades with a fleet of 22 vessels, faced challenges with closing their accounts due to discrepancies in their MS Dynamics Navision system. They sought an advanced system audit to identify and rectify underlying issues affecting Trial Balance, Accounts Receivables, and Payables. The solution involved a thorough system audit to uncover incorrectly mapped entries, transactions, and postings, as well as incorrect codes and rules. Corrective measures were implemented to rectify entries, enabling the client to finally close their books of accounts after two years. The audit also laid the foundation for ongoing checks to prevent similar issues in the future.