Partial disruptions began as of 1.40pm on Aug. 18, the company said on the Azure website.
This is bad news for Microsoft which is touting its cloud-based platform for creating, deploying and maintaining online applications and services such as websites and web-hosted applications. As such, it has to work 24/7 or customers will be severely put out.
Azure is used by governments and corporations around the world, supports various programming languages, tools and frameworks.
Microsoft said that Azure services such as virtual machines, cloud services, mobile services, service bus, site recovery, HDInsight, websites and Storsimple were down during the outage.
However, Vole insisted that the core platform components were working properly throughout and only a small subset of customers were affected by the outage.
Still reports of outages might make many firms question if moving to the cloud is such a good idea, or if they can get the same levels of reliability on-site.