Microsoft is investigating a technical glitch causing significant delays or complete failures when launching the Microsoft Teams desktop client on Windows systems.

  • Windows users may experience delays of up to two minutes when opening Teams.
  • Mac users are facing difficulties joining calls and meetings.
  • Microsoft recommends using web or mobile versions as a workaround.

Tech giant Microsoft has officially acknowledged a widespread issue affecting its Microsoft Teams desktop client. Users operating on Windows systems are reporting significant delays or an absolute inability to launch the application, disrupting workflows across various industries.

The issue, tracked under incident ID TM1466820, was confirmed on Thursday. According to an incident report, when users attempt to open the Teams client on their Windows devices, they may encounter loading hangs that last up to two minutes or fail to load the interface entirely.

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Why This Matters

BozokMedia analysis shows that as remote and hybrid work models become permanent, any instability in communication tools like Microsoft Teams can lead to massive productivity losses. The interconnected nature of Microsoft 365 means that a failure in one component can often signal deeper ecosystem vulnerabilities.

Reliability in enterprise communication tools is non-negotiable; even minor delays can cascade into significant business disruptions.

Microsoft is currently analyzing service logs and telemetry data to pinpoint the exact root cause. To mitigate the impact, the company has advised affected customers to utilize Microsoft Teams on the web or the Teams mobile app to maintain connectivity during the remediation process.

Secondary Issues Affecting Mac Users

Compounding the situation, Microsoft is also investigating a separate issue (tracked as TM1466659) affecting Mac users. This bug prevents users from successfully joining calls and meetings. While a code change was initially suspected, Microsoft is currently reassessing its findings to ensure a more accurate diagnosis of the source of impact.

Historical Context of Microsoft Service Disruptions

This incident follows a series of recent technical hurdles for Microsoft. In April, a bug hindered Microsoft Teams Free users from accessing chat and calling features. Additionally, recent Windows security updates following the August 2026 Patch Tuesday have been linked to crashes in both Teams and the New Outlook application.

Did You Know?: Microsoft Teams is a core component of the Microsoft 365 suite, integrating deeply with SharePoint and Exchange Online.

Frequently Asked Questions

1. How can I access Teams if the desktop app is not working?
Microsoft suggests using the web-based version of Teams or the mobile application as a temporary workaround.

2. Is this a widespread outage?
Microsoft has confirmed it is a known issue affecting multiple users, and they are actively working on a fix.