There are various reports that are available to run for seeing what creditors balances are o/s these are in the Advanced Report Execution.
From the main menu go to the Advanced Report Execution.
Select the Accounts Standard Reports folder.
Select the Purchase folder.
This then has quite a few reports that can be run that stipulate aged creditors.
Pick the format you want the report to show in eg either PDF/Excel.
Select the report you require and select a specific supplier if you require or leave that open ready to run for all suppliers.
Click on Run Report at the bottom this will then produce the results you have selected.