If you’re an Xbox Game Pass and Microsoft Reward points member and looking to score reward points, January is your month as seven exclusive quests are available for subscribers to both programs. You can then turn around and spend those reward points on your Game Pass membership or DLC.
2,100 points are up for grabs this month (the deadlines for each may vary); some are tied to objectives in specific games like The Division, Metro 2033 Redux, and Metro: Last Light Redux, while others can be earned in any title in the Game Pass catalog. For instance, you can get 300 points for getting an achievement in three different games in different genres.
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[Source: Microsoft]
Source: Game Informer Get Microsoft Rewards Points By Completing Xbox Game Pass Quests