**Microsoft Teams** is facing a wave of technical difficulties, creating headaches for IT security professionals and privacy-conscious users who rely on the platform for daily operations. The issues are manifesting differently across operating systems, with **Microsoft** actively working to identify and resolve the root causes. ## Windows Users Face Launch Delays On Windows systems, some users are experiencing delays or complete blocks when attempting to open the **Microsoft Teams** desktop client. **Microsoft** acknowledged this known issue, tracked as **TM1466820**, on Thursday at 16:45 EDT. The company's incident report noted that users might face initial loading difficulties or delays of up to two minutes. For affected users, **Microsoft** has advised utilizing the web or mobile versions of **Teams** as a temporary workaround while they analyze service logs and telemetry data. The company is also engaging directly with some impacted users to pinpoint the underlying cause and determine effective mitigation strategies. ## Mac Users Unable to Join Calls and Meetings Simultaneously, **Microsoft** is investigating a separate issue preventing **Mac** users from joining **Teams** calls and meetings. This problem, tracked as **TM1466659**, was confirmed on Sunday at 08:32 EDT. Initially, **Microsoft** attributed the disruption to a code change that reportedly caused the **Teams** call and meeting service infrastructure to fail in processing some requests. However, further review has led the company to reassess this initial understanding, and they are now reviewing service logs to isolate the true source of the impact. ## A Series of Recent Disruptions These current outages are not isolated incidents. In April, **Microsoft** resolved an issue that blocked some **Microsoft Teams Free** users from chatting and calling. More recently, on Tuesday, the company confirmed a bug causing crashes and launch failures for **Microsoft Teams** and **New Outlook** users after installing **Windows** security updates released since the August 2026 Patch Tuesday. Earlier today, **Microsoft** also notified customers of an ongoing **Exchange Online** issue, affecting multiple mailboxes and leading to "Server busy" errors and delays for emails sent to and received from external domains. As **Microsoft** continues its investigations, users are encouraged to monitor service health dashboards for updates. These recurring service interruptions highlight the critical need for robust incident response and transparent communication from cloud service providers, especially for platforms as integral as **Microsoft Teams**.