Microsoft Corp reported a 3.6 per cent rise in quarterly profit on Thursday, powered by a surge in demand for the company's flagship cloud platform Azure.

The company's shares were marginally higher at US$64.34 in after-hours trading.

Since taking charge in 2014, Chief Executive Satya Nadella has steered the company toward cloud services and mobile applications away from its slowing traditional software business.

The company's "Intelligent Cloud" business, which includes Azure, rose eight per cent to US$6.9 billion in the second quarter.

That beat analysts' average estimate of US$6.73 billion, according to research firm FactSet StreetAccount.

Revenue from Azure, which businesses can use to host their websites, apps or data, jumped 93 per cent in the quarter. Sales had more than doubled in the preceding quarter.

The Azure platform competes with offerings from companies including Amazon.com, Alphabet Inc's Google, IBM Corp and Oracle Corp.

Microsoft does not give an absolute revenue figure for Azure. Amazon's AWS, Azure's biggest competitor, grew revenues 55 per cent to US$3.23 billion in its most recent quarter.

Sales in Microsoft's personal computing business, which includes its Windows software, fell five per cent to US$11.8 billion.

Worldwide PC shipments, which have been in decline since 2012, fell 5.7 per cent in 2016 from a year earlier, according to research firm IDC. However, the market is showing signs of stabilization.

Nadella also orchestrated Microsoft's biggest acquisition, the US$26.2 billion deal for LinkedIn. The transaction closed last month.

LinkedIn contributed US$228 million of revenue in the second quarter, Microsoft said. LinkedIn also reported a net loss of US$100 million, or one cent US per share, in the quarter.

Excluding items, Microsoft earned 83 cents US per share.

The company's net income rose to US$5.20 billion, or 66 cents US per share, in the second quarter ended Dec. 31, from US$5.02 billion, or 62 cents US per share, a year earlier.

Adjusted revenue rose to US$26.07 billion from US$25.51 billion.

Microsoft's shares had risen 23.2 per cent in the past twelve months, compared with the 20.7 per cent gain in the broader S&P 500 index.