The Financial Lock, when enabled and a date has been specified, will prevent any unwanted or accidental changes to invoices that were created on or before the date set on the financial lock. All invoices created after this date will be unaffected.

To enable the financial lock select the Options Tab on the top right-hand corner of your iinsight screen (as per the below screenshot):

Then select the Financial Settings tab (as below):

If you try to invoice a cost or adjust an invoice that was made before the financial locking date the system will give you the following error message:

The system log will show you dates and times that Financial periods were locked/unlocked and by which user as below:

Located in the Admin menu > System Logs