March 12, 2012 – Microsoft will bolster its Azure cloud platform testing, controls and tools, as well as beef up customer communications in response to the “extraordinary nature” of an 18-hour disruption triggered by a Leap Day software bug.

In a blog on the incident posted Friday evening, Microsoft lead engineer Bill Laing wrote that the incident occurred in two phases. Initially, a software bug connected to the oversight of Leap Day information included in Azure’s customer access led to Microsoft taking the entire platform offline for a few hours. That was followed by corrupted service offerings from clusters that remained connected, particularly impacting servers handling some U.S. and northern European customers.

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