Microsoft says it has been granted a licence from the US government to export software to Huawei.
"On November 20, the US Department of Commerce granted Microsoft's request for a licence to export mass-market software to Huawei. We appreciate the Department's action in response to our request," a Microsoft spokesman told Reuters via email.
The administration of US President Donald Trump on Wednesday gave Huawei its second reprieve this week, allowing some suppliers to restart sales to the Chinese telecoms giant after it was placed on a trade blacklist over national security concerns six months ago.
The Commerce Department confirmed it had begun issuing licences for some companies to sell goods to Huawei, expanding the company's supplier base and providing long-awaited clarity to the industry that once sold it billions of dollars worth of goods.
On Wednesday, a US official said it had received roughly 300 licence requests, about half of which had been processed. Roughly half of those - or one quarter of the total - had been approved and the rest denied.
It was not immediately clear which products had been approved for sale to the world's top telecommunications equipment maker, which is also the world's second-largest smartphone maker.
A person familiar with the process said Wednesday that some licences for sales of mobile phone components and non-electronic components were approved.
Huawei has been anxiously awaiting a licence for Alphabet Inc's Google to supply its mobile services to new models.
Without access to Google services such as its Play Store for apps, Huawei phones will become harder to sell to consumers outside of China.
Google declined to comment on Thursday.
The granting of licences comes as the Trump administration is working to sign a phase one trade deal with China to end a tit-for-tat trade war that has roiled markets and hit global growth.