Auto round off was a company-wide setting with no way to differ on one document. An invoice can now overrule it either way — and leaving it alone behaves exactly as before.
A Per-Invoice Round Off Toggle
The rounding toggle on a vendor invoice has three states, not two. Unset — the default, and every invoice raised before this existed — means the operator has overruled nothing and the company’s AP posting configuration decides, exactly as it always did. Only an explicit yes or no overrules it.
The rounding difference must have somewhere to post, so a configured round off account is a precondition even when the toggle is switched on by hand: an invoice that cannot post is worse than one that is not rounded.