Table-topping Barnet made light work of overpowering Exeter with three goals in a fine second-half performance.
The first half was even and scrappy but Barnet took control after the break and deserved the three points.
City boss Eamonn Dolan received a rousing reception from his adoring home supporters at the start of his last game in charge of the Grecians before taking over the youth team set-up at Reading.
But it was a sad night to end his 13 years at St James Park.
There was little action in a scrappy opening. Barnet had the first attempt at goal in the tenth minute when Richard Graham's shot flew over the bar.
Exeter's best early moment came when Jake Edwards pounced on a loose ball but was unable to direct his shot on target from the edge of the box.
Edwards then fired wide from 15 yards as Exeter attempted to push forward.
The first half was poor and neither goalkeeper had a single save to make.
After the break Les Afful went close for Exeter with a shot that flew just over the bar following a half-cleared corner.
It took an hour for the first shot on target, when Exeter's Sean Canham fired a low shot at the goalkeeper.
But three minutes later Barnet were ahead when former City midfielder Dwane Lee headed home Simon Clist's corner.
Exeter substitute Sean Devine came close to an equaliser when he pulled a shot past the post from 15 yards.
Exeter thought they had pulled level when Devine headed home but the effort was ruled out for offside.
But the game was put beyond Exeter with two goals in a minute. Graham drilled a low shot into the bottom corner from eight yards following a neat move and Dean Sinclair then struck a fierce shot past Martin Rice from 15 yards.