Microsoft has accepted Bitcoin as a form of payment for a long time.
Recently the company did a step back and remove the option to pay in Bitcoin.
The reasons specified :
1. High fee on transactions
2. Long delay to get confirmation of the transactions.
3. Extreme volatility
most of sites remove the option to pay in Bitcoin because same reasons.
fee was very high last two months and many of users stop paying with bitcoin.
now bitcoin system back normally and i think Microsoft will back payment option.