Bowe, 32, played in the first half of the game in Naas and came through unscathed before being replaced at half-time as had been the plan.
The Lions star had been out since sustaining a knee injury in Ireland's World Cup defeat by Argentina.
Bowe suffered posterior cruciate ligament and meniscal damage.
His return is a timely boost as the Belfast club attempt to secure a place in the Pro12 play-offs.
Les Kiss's men are currently fifth in the standings and have three matches left, against Zebre, Leinster and Ospreys.
Darren Cave captained the Ulster A team as they earned a 38-31 win in Thursday's game.

The crash happened on Monday in Nord Troendelag county, 700km north of Oslo.
Photographs show the concertinaed car surrounded by debris on the road next to the undamaged tank.
About 15,000 troops from Nato and partner countries are in Norway taking part in the Cold Response exercise.
The 50-tonne tank involved in the accident was a Norwegian "armoured recovery vehicle", Lt Col Aleksander Jankov of the Norwegian Armed Forces was quoted by the AP news agency as saying.
"The military is exercising to protect national security. Accidents are always tragic and we think it is particularly sad that a person has died in connection to the military exercise," he said.
He said two military personnel inside the tank were unhurt and that the accident 22km (13.5 miles) south of Snasa is now being investigated by police and military police.
"There was only one person in the car, while there were two people from the Norwegian armed forces in the tank," Rune Reinsborg from Troendelag Police told the  NTB website.
"We don't know the circumstances surrounding the accident yet."
The Norwegian armed forces began the large-scale Cold Response exercise on 19 February in Troendelag. Troops taking part come from 14 countries. The exercise lasts until 22 March.

The 20-year-old has only started one game for the Canaries since joining from Coventry City in January 2016, but has spent time back on loan with the Sky Blues and Aberdeen.
Maddison told the club website: "Last season was a big learning curve for me.
"I went on loan and then came back. I made a few appearances and I've only been looking forward since then."
Ireland winger Tommy Bowe played his first match since October in the Ulster's A game against their Munster counterparts on Thursday.
[NEXT_CONCEPT]
A motorist was killed when his car collided with a tank on a rural road during a major Nato military exercise in central Norway, police and military officials say.
[NEXT_CONCEPT]
Midfielder James Maddison has signed a contract which keeps him at Norwich City until the summer of 2021.