Critical impactResolvedCollaboration

Calendly outage: Outlook 365 Login Issues

Calendly reported this critical-impact incident on its official status page on Apr 15, 2026, 15:21 UTC. It has since been resolved.

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Apr 15, 2026, 15:21 UTC
started
Jan 29, 2019, 23:06 UTC
resolved
—
duration
Critical
impact
  1. resolvedJan 29, 2019, 23:06 UTC

    DNS issues affecting logins using the Outlook 365 service appear to have been resolved. If you experience any further issues, please reach out to [email protected]

  2. monitoringJan 29, 2019, 22:23 UTC

    Microsoft engineering teams have identified a DNS issue and have failed over to an alternative DNS provider. The login issues with the Calendly platform appear to be fixed. We are monitoring closely and will provide any further updates as necessary.

  3. identifiedJan 29, 2019, 21:57 UTC

    The root cause of this issue appears to be an outage in Microsoft's Azure cloud services. We will provide updates as we receive them.

  4. identifiedJan 29, 2019, 21:47 UTC

    The issue appears to only affect a small subset of users and is intermittent in nature. If you experience problems logging in, please refresh and try again.

  5. identifiedJan 29, 2019, 21:38 UTC

    We have identified an issue with logins affecting customers using Microsoft's Azure Active Directory service. This can affect users that have signed up for Calendly using the Outlook 365 service and prevent them from logging into the application. Our team has identified a fix and is working on resolving the issue.

What APIStatus.watch saw

Our 5-minute checks didn't record a change in Calendly's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

How often does Calendly have incidents?

Calendly reported 2 incidents in the last 90 days. A typical incident lasted 11h 49m. See Calendly's uptime and incident history