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(WJET/WFXP) — Several airlines and multiple services worldwide are seeing major disruptions in the wake of a major Microsoft and Crowdstrike outage. Around 7 a.m., Microsoft 365 said they have released a fix for the update that had caused the disruptions.

Both American Airlines, Allegiant Air, PSA, and Spirit Airlines canceled their ground stops. United Airlines has since canceled their ground stops as of 11:26 a.m.

As of 6:25 ET, 540 flights in the U.S. have been canceled.

The airlines that still have a ground stop are Allegiant Airlines, and Delta Airlines. This ground stop will remain in effect until further notice.

United said in a statement that “A third-party software outage impacted computer systems worldwide, including at United. We are resuming some flights but expect schedule disruptions to continue throughout Friday. We have issued a waiver to make it easier for customers to change their travel plans via United.com or the United app.”

Over in Australia, many of their flights are also affected, and they have been seeing issues in their banks amid the outage.

CrowdStrike has confirmed that the outage was not caused by any cyberattack but was caused by a defect in a single content update.

A statement from George Kurtz, president and CEO of Crowdstrike, reads:

Today was not a security or cyber incident. Our customers remain fully protected.

We understand the gravity of the situation and are deeply sorry for the inconvenience and disruption. We are working with all impacted customers to ensure that systems are back up and they can deliver the services their customers are counting on.

As noted earlier, the issue has been identified and a fix has been deployed. There was an issue with a Falcon content update for Windows Hosts.

For the latest information that we will continuously update, please refer to the CrowdStrike website, my posts on LinkedIn, and my posts on X.  I will continue to provide updates to our community and the industry as they become available.

The grounding is connected to a major service outage with Microsoft, causing disruptions worldwide. Systems worldwide are now being affected. Worldwide, there are reports of major issues in hospitals, 911 call centers, airports, ports, and more.

Major cybersecurity platform CrowdStrike provides advanced cybersecurity solutions to Windows PC are also facing outages, which have logged users out of systems.

“We’re investigating an issue impacting users ability to access various Microsoft 365 apps and services.” Microsoft365 said in a post on X late Thursday evening.

More information will be provided as it is received.