My gamertag doesnt change in the xbox app - Microsoft Community

How to Change Your Gamertag on an Xbox One in a Few Simple Steps

Gamertag Lookup: Find the Tag You're Looking For

Xbox Family Settings App

How to Change Your Xbox Gamertag

Old gamertag showing on Xbox app - Microsoft Community

Gamertag Lookup: Find the Tag You're Looking For

Xbox Launches New Voice Reporting Feature, Empowering Players with The Option to Capture and Report Inappropriate In-Game Voice Chats - Xbox Wire

Xbox One Preview updated once again with fixes for Games & Apps, Cortana

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New Xbox App (Beta) on Mobile Keeps You Connected to Your Games, Friends, and Fun - Xbox Wire