Office 365 Monitoring - Service Outages

Read the latest updates, root causes, and resolutions on Microsoft Office 365 service outages.

Microsoft 365 Services - Outages in EMEA (August 10, 2022)

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ENow Software

On August 10, 2022, at ~8:44AM EST, Microsoft communicated via tweet (@MSFT365status) that they're investigating an issue where some users in the EMEA region are unable to connect to some Microsoft 365 services.

For IT pros or system admins, additional information can be found under SI MO411804 in the admin center.

Reports indicated this is due to a Cisco Meraki firewall Intrusion Detection and Prevention (IDR) false positive blocking Microsoft 365 connections with "Microsoft Windows IIS denial-of-service attempt" alerts. According to a Cisco Meraki employee, "We would like to make you aware of a vulnerability reported by Microsoft CVE-2022-35748 , triggering SNORT rule 1-60381".

The employee also stated, "Our recommendation at this time is to follow Microsoft's guidance and ensure that your Servers, OS and software are up to date with the latest security patches."

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Exchange Online & Outlook.com Services

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ENow Software

On July 18, 2022, at ~9:55 AM EST, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue with users accessing or experiencing degraded functionality when using Exchange Online and outlook.com services. 

For IT pros or system admins with Microsoft admin center access, the incident number for further details is EX401976 and OL401977 in the admin center.

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Microsoft Teams Service Issue listing image

Microsoft 365 Monitoring: Teams Service Incident (April 28, 2022)

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ENow Software

On April 28, 2022, at ~10:04 AM EST, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which users were unable to make or receive calls using Microsoft Teams.

For IT pros or system admins with Microsoft admin center access, the incident number to reference the issue was TM365276.  This service incident comes 1 day after a minor service incident involving Microsoft Sway.

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Microsoft Sway Service Incident listing image

Microsoft 365 Monitoring: MSFT Sway Service Incident (April 27, 2022)

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ENow Software

On April 27, 2022, at ~8:59 AM EST, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue involving Microsoft Sway.

For IT pros or system admins with Microsoft admin center access, the incident numbers to reference the issue were MO364969 and SW364924.  The apparent issue involved users not being able to either access or create within Sway.

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