Cloud Computing: Microsoft’s Office 365 uptime exceeds 99.9%

Grazed from ComputerWorld. Author: Juan Carlos Perez.

Dropping the veil of secrecy over Office 365 uptime, Microsoft has released availability data for each of the past four quarters and is celebrating the results. Between July 2012 and June 2013, the overall quarterly uptime for the cloud-hosted email and collaboration suite hit 99.98 percent, 99.97 percent, 99.94 percent and 99.97 percent, Microsoft said on Thursday in a blog post.

Those percentages are calculated based on the number of minutes in each calendar month and the number of minutes in which the Business, Government and Education editions of Office 365 were available worldwide. "Individual customers may experience higher or lower uptime percentages compared to the global uptime numbers depending on location and usage patterns," the blog post reads…

Previously, uptime information was available only to Office 365 customers, but from now on Microsoft will report this data publicly on a quarterly basis. The Office 365 components measured for uptime are Exchange, SharePoint, Lync and Office Web Apps "weighted on the number of people using each of these services," according to the blog post…

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