That is great news for De Boer, whose predecessor as national coach, current Barcelona boss Ronald Koeman, was among the spectators.
That means De Boer can rest players for the final group game against North Macedonia on Monday, safe in the knowledge that the Dutch will be going to Budapest for a last-16 tie on June 27 against a third-place finisher.
Austria, after all, are a mediocre side and were not helped by the penalty carelessly given away by Alaba, their captain and best player.
Whoever comes second in this group will play the Group A winners -- either Wales or Italy -- in London on June 26.
The former Manchester United man believes he is good enough to play for a club of Barcelona's stature, and he confidently stroked home the early spot-kick awarded following a VAR review for Alaba's foul on Dumfries.
Moments later De Boer shook things up with a triple change, including sending on PSV Eindhoven forward Donyell Malen for Weghorst.