Microsoft removed it because they said that it is unstable currency (highly volatile). But i found an article that says that it is only temporary and microsoft will resume accepting Bitcoin as payment method and users can continue to fund their accounts with Bitcoin, I will provide a link of the article below, I don't know if this is true but I don't care if they will removed it or not because I don't want to use my Bitcoin to buy in microsoft online stores. I don't even think that there are lots of people funding their microsoft accounts with Bitcoin. Anyone here?
Here's the link: https://www.thurrott.com/microsoft/149835/microsoft-now-lets-pay-with-bitcoin-once-again