Acc to a new report, shortly after Asha Sharma became CEO of Xbox she decided to end the "This is an Xbox" campaign and remove it from Xbox's various domains and social media accounts.

https://www.gamespot.com/articles/killing-this-is-an-xbox-campaign-was-new-ceos-decision-report/1100-6538987/?ftag=CAD-01-10abi2f&utm_source=dlvr.it&utm_medium=twitter