In a statement provided to CNN, Microsoft said it has agreed to recognize the union.
“Microsoft has lived up to its commitment to its workers and let them decide for themselves whether they want a union,” CWA president Chris Shelton said in a statement.
Some companies like Amazon have so far refused to recognize workers who have voted to form a union.
The union bid at the Microsoft subsidiary, however, stands out from some of the others because of Microsoft’s openness to employee organizing efforts.
Microsoft last year entered into a neutrality agreement with the CWA, which is also supporting organizing efforts from workers at Activision Blizzard, the gaming giant Microsoft agreed to acquire for $68.7 billion.