The outage affected email users both locally and around the world.
Thursday's outage involving Microsoft Outlook was felt among organizations in Kingston.
The office of Kingston and the Islands MPP Ted Hsu was closed early due to outage that affected their email and phone system. Staff were not able to read and answer emails or calls from the constituents.
The City of Kingston says they were unable to send or receive emails but managed to maintain normal operations.
Kingston Health Sciences Centre says the outage was limited to their email, and there were no impacts to patient care or services as they had contingency plans and procedures in place to respond to technology disruptions.
The outage also had minimal impact at Queen's University and Greater Kingston Chamber of Commerce. They and others were able to get back online on Friday.
The widespread outage affected several Microsoft platforms. Many users encountered problems using their email accounts and other errors across the tech giant's suite of apps.
The company says the problems were not caused by hackers but attributed the issue to an "elevated load" on its infrastructure.
Story by Ken Hashizume
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