Millions of users of Hotmail and other Microsoft services worldwide were unable to access their online accounts this morning after the firm's "cloud" suffered a major technical failure.
As well as Hotmail, the outage affected Office 365 and the Skydrive online storage service.
Microsoft said the cause appeared to be related to the Domain Name System, the computer network that ensures that web addresses are connected to websites.
As well as Hotmail, the outage affected Office 365 and the Skydrive online storage service.
Microsoft said the cause appeared to be related to the Domain Name System, the computer network that ensures that web addresses are connected to websites.