The popular messaging service told the BBC in a statement it “categorically denies Ofcom’s accusations”.
The firm will take data from the way employees work for its artificial intelligence models.
The creator of iconic series such as Fable says Masters of Albion will be the last game he makes.
The AI company has said the model is too dangerous to release publicly because of its hacking capabilities.
New Call of Duty games will be added to the subscription service “about a year” after release, Microsoft said.
The data bank which contains medical data of 500,000 people said no personally identifiable information had been hacked.