The Welshman, appointed as interim boss after David Moyes's sacking, called on his long-time teammate to assist in Wednesday's practice session, his first in his new role.
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Former United teammates Nicky Butt and Phil Neville – who are on the club's coaching staff – were also present at the Carrington training ground.
Butt coaches the club's Under-19 team and Scholes has assisted in the club's European campaign.
Neville remains part of the club's first-team staff despite the departure of Moyes, with whom he also worked at Everton.
Along with Gary Neville, the four members of the 'Class of '92' agreed a deal in March to buy non-league club Salford City FC together.
United is languishing in seventh in the Premier League table, 23 points behind table-topper Liverpool and with the hope of Champions League qualification extinguished.