back to article This better not be a cruel prank: Microsoft promises 99.99% uptime for Azure Active Directory from 1 April

Microsoft is "taking the next step in our commitment to the resiliency and availability" of Azure Active Directory by promising 99.99 per cent uptime from 1 April 2021, rising from 99.9 per cent for the current Service Level Agreement (SLA). Azure Active Directory (AD) – a critical component in the company's Azure cloud …

  1. Ken Moorhouse Silver badge


    If Excel is displaying the result, what formula/formatting is in use?

  2. el kabong

    Plausible deniability, business savvy at m$ is as high as ever

    When it fails they can always pretend their promise was just an april fools joke and m$ cannot be held accountable for damages caused.

    M$ has chosen the safe route, again. Very clever!

  3. IB2

    Paying customers only?

    Have to suspect this will be for "paying customers only", no Premium AAD subs yields no toothless SLA.

    AAD; a necessary evil.

    1. MatthewSt

      Re: Paying customers only?

      Considering the SLA is usually a refund of what you've paid, they could technically offer you the 25% refund but you'll still get nothing

      1. teknopaul Silver badge

        Re: Paying customers only?

        So what this says is, if we sell you something and don't deliver it at all, you get 25% back.

        Thanks Microsoft, would you like to buy my car?

  4. Richard 12 Silver badge

    They can't hit 3 nines

    So what makes anyone think they'll manage four?

    1. Lee D Silver badge

      Re: They can't hit 3 nines

      I'm not even joking but they struggled with 2 nines over 2020, and in previous years!

    2. FatalR

      Re: They can't hit 3 nines

      I'm confident they could manage 4 days.

    3. aregross

      Re: They can't hit 3 nines

      All they mean is the Link LED is on at the Switch.

    4. Anonymous Coward
      Anonymous Coward

      Re: They can't hit 3 nines

      They consistently hit 4 nines... depending on where the decimal place is put.


  5. Lee D Silver badge

    So if they're down for more than 8 seconds a day on average, or an hour a year, you get your money back?

    Well, that's going to make Azure very much cheaper!

    1. Ragarath

      Does the SLA say you only get money back for the time it's down? Then in credits?

      No saving at all if so really. Good PR for MS though.

    2. Anonymous Coward
      Anonymous Coward

      If its down 100% of the time you pay nothing.

      If you could get away with that you wouldn't be paying them.

      Sadly the downtime costs are usually much more than just the payment for the service. It's about time companies start throwing in more than 100% refund if they're so confident.

  6. This post has been deleted by its author

    1. Ragarath

      Re: Four 9’s on a 24x7 system is pretty poor

      By my calcs, it's less than an hour a year?

      1. Steve Todd

        Re: Four 9’s on a 24x7 system is pretty poor

        Math error (99.99% != 0.99), withdrawn.

  7. IT's getting kinda boring

    "Microsoft increased their number by five times in 2020"

    So now they have 5 then?

  8. Kevin McMurtrie Silver badge

    Should always ask

    If there are other numbers among the four nines, like 93.999%.

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