Use cases
Software Products E-commerce MSPs Schools Development & Marketing DevOps Agencies Help Desk
Company
Internet Status Blog Pricing Log in Get started free

Mitel Outage History

Every past Mitel outage tracked by IsDown, with detection times, duration, and resolution details.

There were 123 Mitel outages since November 2019. The 8 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Major March 24, 2026

March 2026: CloudLink Daemon Service Disruption for MCX/MiCC

Detected Mar 24, 2026 5:23 AM EDT · Resolved Mar 25, 2026 7:32 AM EDT · Duration 1 day

The Mitel CloudLink Daemon service went down for MCX/MiCC systems due to a failed update on March 23/24 that left the Windows service in a stopped state, affecting the Tunnel component for 26.2 hours. The issue was resolved by rolling back the CloudLink Daemon to version 1.8.66+139 and restarting the service on affected MiCC-B/MCX systems.

Major March 20, 2026

March 2026: Issue with Tunnel service causing connection errors

Detected Mar 20, 2026 1:39 PM EDT · Resolved Mar 23, 2026 9:33 AM EDT · Duration 3 days

Mitel's Tunnel service experienced a major outage lasting 67.9 hours due to a temporary capacity issue that caused connection errors and affected service availability during high demand periods. The root cause was identified and the service was restored, with additional safeguards implemented to prevent future occurrences.

Major March 4, 2026

March 2026: Elevated Error Rate on Notification Service in EU

Detected Mar 4, 2026 10:08 AM EST · Resolved Mar 4, 2026 4:16 PM EST · Duration about 6 hours

Mitel's Notification service in the EU region experienced elevated error rates for 6.1 hours, impacting Workflow functionality and Microsoft Teams presence synchronization. The disruption was caused by an unexpected rapid spike in traffic that exceeded the service's capacity. The service was restored and the issue was fully resolved after continued monitoring.