The vice-president phoned the coach to wish him happy birthday, suggesting all has been forgotten after verbal remarks following the defeat to Real Madrid.
Galliani was left angry and embarrassed by Milan's 5-1 friendly defeat to Real Madrid last week and clearly felt Allegri was to blame, criticizing the coach for the number of substitutions he made in the game.
“When you play against Real Madrid you should not think it is just a friendly,” he was reported as saying by the Gazzetta dello Sport.
“We’re in New York, in front of 60,000 people, a full stadium, all eyes on him, millions of eyes connected via the TV. Milan is not playing at a Serie D side."
Galliani was infuriated by Allegri’s decision to make nine substitutions in the second half at Yankee Stadium, even though opposing boss Jose Mourinho made 11 changes.
“It was a serious mistake and I will not tolerate these figures. I’m p****d off,” he frankly stated
Following his angry outburst with Allegri, Galliani, according to Gazzetta dello Sport, sought to consolidate his relationship with the Milan coach and used Allegri's birthday as an opportunity to improve relations.
AC Milan start their Serie A campaign on the August 26 at home to Sampdoria.