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Wednesday, 28 November 2018 06:32

Microsoft cloud services hit by MFA issues again Featured

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Microsoft cloud services hit by MFA issues again Pixabay

Just a day after it issued a lengthy explanation of why its cloud multi-factor authentication failed last week, Microsoft has been hit by a similar issue again, with customers complaining that they have been unable to sign in to their Office 365 accounts.

A number of cloud services offered by the Redmond software giant use the MFA offered by Azure Active Directory to authenticate by default.

The Azure status page indicates that the issue began at 14.25 UTC on Tuesday (1.30am AEDT on Wednesday), when customers started experiencing difficulty signing into resources offered via Azure.

The company says the severity of the problem lessened by 17.08 UTC on Tuesday (4.08am AEDT Wednesday).

"After a preliminary investigation, engineers found that an earlier DNS issue triggered a large number of sign-in requests to fail, which resulted in backend infrastructure becoming unhealthy," the company said.

"After the DNS issue was resolved, engineers then focused on cycling the relevant backend services to resolve the congestion issue. They observed a decrease in the failure rate after the reboot cycles.

"Engineers continue to monitor overall platform health and prevent future occurrences. A full Root Cause Analysis will be made available within 72 hours."

On Tuesday AEDT, Microsoft faced issues with its Exchange Online service, with a number of products being affected.

Last week's 19-hour MFA issue was resolved by the company resorting to an age-old remedy that has been used for Windows systems – rebooting.


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Sam Varghese

Sam Varghese has been writing for iTWire since 2006, a year after the site came into existence. For nearly a decade thereafter, he wrote mostly about free and open source software, based on his own use of this genre of software. Since May 2016, he has been writing across many areas of technology. He has been a journalist for nearly 40 years in India (Indian Express and Deccan Herald), the UAE (Khaleej Times) and Australia (Daily Commercial News (now defunct) and The Age). His personal blog is titled Irregular Expression.

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