The results reflect Chief Executive Satya Nadella’s focus over his six-year tenure on cloud computing, in which companies tap Microsoft’s data centers for computing power – a growing business dominated by Amazon.com Inc’s Amazon Web Services. For the fiscal fourth quarter, Microsoft gave business-unit forecasts that were below analyst estimates, predicting tough times for LinkedIn and some small-business software sales. “Ultimately, Microsoft is not immune from what is going on broadly in the world in terms of GDP growth,” Nadella said on a conference call with investors.