In order for Invoices to sync to NetSuite, the Invoice's accounting period must be open, and unlocked.
In addition, NetSuite has a configuration that will prevent Invoices from syncing if the Invoice date is outside of the current period.
If you would like to allow these invoices to sync, have your NetSuite Administrator make the following change:
- Go to Setup -> Accounting -> Accounting Preferences
- Go to the "Allow transaction Date Outside of Posting Period" section
- Select "Allow"
For additional Syncing Best Practices, check out: Best practices to minimize sync issues