Mio Outage History
Mio is up right nowMio had 21 outages in the last 2 years totaling 2221h 48m of downtime — averaging 0.9 incidents per month.
There were 21 Mio outages since December 12, 2024 totaling 2221h 48m of downtime. Each is summarised below — incident details, duration, and resolution information.
Delayed message delivery
Timeline · 4 updates
Message Latency
Timeline · 2 updates
- monitoring Aug 10, 2026, 03:15 PM UTC
At approximately 9:00 AM UTC on August 10th, Mio experienced a brief service outage. Service has since been restored. We are currently processing the backlog of events in the order they occurred. As a result, end users may experience elevated message latency while the queue is worked through. No messages moving forward have been lost — this is a processing delay only. We will post another update once the event queue has been fully processed and confirm when we return to Operations Normal.
- resolved Aug 10, 2026, 06:53 PM UTC
This incident has been resolved.
Elevated Message Delivery Latency
Timeline · 6 updates
Investigation - Message latency from Microsoft to Google
Timeline · 3 updates
- investigating Apr 20, 2026, 05:10 PM UTC
Mio is currently investigating message latency from Microsoft to Google. We will update this incident when a root cause is identified.
- monitoring Apr 21, 2026, 03:14 PM UTC
Mio has fixed the issue where end user messages were delayed from Microsoft to Google. This degraded service was caused by a deployment of multiple microservices, where one service was out of sync with the others, causing delays and failures of messages. The failure prevented our retry strategy from completing, which resulted in the delays and failures. We will resolve this issue after monitoring for the next few hours.
- resolved Apr 22, 2026, 02:37 PM UTC
This incident has been resolved.
Investigation - Message Latency
Timeline · 2 updates
- investigating Apr 13, 2026, 04:43 PM UTC
Mio is investigating a potential issue impacting message latency. Mio will update this page over the next few hours with further details.
- resolved Apr 13, 2026, 06:45 PM UTC
This incident has been resolved.
Potential Mio Service Degradation
Timeline · 2 updates
- investigating Mar 13, 2026, 01:47 AM UTC
We are currently investigating a potential service degradation for Mio users. Initial investigations point to an issue with the Microsoft service responsible for rate limiting. We are actively investigating and will update when we know more.
- resolved Mar 16, 2026, 03:44 PM UTC
This incident has been resolved.
Message Latency from Microsoft Teams to Google Chat
Timeline · 2 updates
- investigating Mar 09, 2026, 03:29 AM UTC
We are currently investigating this issue.
- resolved Mar 11, 2026, 03:17 PM UTC
This incident has been resolved.
Third Party Endpoint Causing Message Latency
Timeline · 3 updates
- investigating Feb 17, 2026, 04:31 PM UTC
Mio is currently investigating a third party end point that looks to be the root cause for message latency. We will provide more details once our investigation has completed.
- monitoring Feb 17, 2026, 07:52 PM UTC
We are actively monitoring a Microsoft outage that occurred early on 2/17/2025 that is impacting Microsoft Teams. "Users may experience delays and failures when sending and receiving chat messages that include inline media (images, code snippets, videos)" - This incident can be tracked under the Microsoft ticket TM1233974 (admin.microsoft.com/#/MessageCenter/:/messages/TM1233974).
- resolved Feb 19, 2026, 05:49 PM UTC
We have moved this to resolved, as we have seen the third party api be stable over the past few days. Mio will continue to monitor the impact of the degraded performance to make sure service is working as expected for all clients.
Experiencing Message Latency Microsoft to Google
Timeline · 3 updates
- investigating Feb 13, 2026, 03:36 PM UTC
Mio is actively investigating an issue that is impacting message delivery from Microsoft to Google, causing slowness of messages, or even failed messages. Mio will update the status as we identify, fix, and monitor the issue.
- monitoring Feb 13, 2026, 06:52 PM UTC
Mio has fixed the issue where end user messages were delayed or failing from Microsoft to Google. This degraded service was caused by a deployment of multiple microservices, where one service was out of sync with the others, causing delays and failures of messages. The failure prevented our retry strategy from completing, which resulted in the delays and failures. Older failures and delays should now be delivered, and new messages are being delivered as expected. We will resolve this issue after monitoring for the next few hours.
- resolved Feb 14, 2026, 12:05 AM UTC
This issue has now been resolved.
Intermittent Message Failure Update
Timeline · 2 updates
- monitoring Dec 04, 2025, 04:17 PM UTC
Mio is currently experiencing an intermittent issue that may impact an end users message delivery - the issue has been identified, fixed, and is now being monitored by our team, however we want to make sure you are aware that we were alerted of the issue by automated alerts. Mio will update this status after monitoring the fix that has already been released over the next few hours.
- resolved Dec 10, 2025, 04:06 PM UTC
After implementing minor changes, and monitoring the fix, we are now confident that the intermittent issue around end user message delivery has been resolved.
Update Regarding Mixpanel Security Incident
Timeline · 1 update
System Wide Message Delivery Delays
Timeline · 3 updates
- investigating Nov 18, 2025, 04:30 PM UTC
We are currently investigating an issue causing message delivery delays of up to five minutes across all supported platforms. This may affect users sending or receiving messages between Google Chat, Microsoft Teams, and Slack. At this time, the underlying cause has not yet been identified, and we do not have an estimated time for recovery. Our engineering team is treating this as a top priority and is actively analyzing system performance, queues, and external dependencies to isolate the source of the delays. We will provide an update as soon as more information becomes available.
- monitoring Nov 19, 2025, 03:13 AM UTC
We have implemented changes intended to improve system performance and reduce message delivery delays. Early results are positive, and overall latency has decreased since these updates were applied. At this time, we are closely monitoring the system to confirm stability before marking the incident as resolved. We will provide another update once we have sustained healthy performance across all affected services.
- resolved Nov 19, 2025, 02:54 PM UTC
System performance has returned to normal, and message delivery is now operating as expected across all platforms. Our team has been monitoring the environment and has confirmed stable performance following recent adjustments. This incident is now resolved. Thank you for your patience while we worked to restore normal service.
Degraded Google Workspace Connectivity – Subscription Refresh Failures
Timeline · 5 updates
Degraded Performance due to AWS issue in the US-East-1 region
Timeline · 3 updates
- investigating Oct 20, 2025, 11:55 AM UTC
Due to the 'Operational issue - Multiple services' services issues affecting AWS we are seeing degraded performance and an increase error rate on the Mio service.
- monitoring Oct 20, 2025, 11:47 PM UTC
As a result of AWS us-east-1 returning to operational status we are now seeing our own services returning to normal. We will continue to monitor operations closely to confirm full stability.
- resolved Oct 21, 2025, 11:46 AM UTC
Following extended monitoring this incident is now considered resolved.
Slow message delivery from Microsoft Teams to Google
Timeline · 3 updates
- identified Aug 26, 2025, 01:11 PM UTC
We have identified the root cause of an issue causing slow delivery of messages from Microsoft Teams to Google. Our engineering team is actively working on a fix and will deploy the solution as soon as possible. We will provide updates as progress is made.
- identified Aug 28, 2025, 03:05 PM UTC
We are continuing to work on a fix for this issue.
- resolved Sep 02, 2025, 01:54 PM UTC
We identified a misconfiguration in Microsoft’s endpoint classification that affected Mio’s ability to maintain valid subscriptions for message delivery. Microsoft deployed a hotfix and, with additional configuration updates from Mio, full service has been restored. We are also implementing improvements to further strengthen resilience against similar issues in the future.
Directory Sync Issues for Organizations that use Google Groups
Timeline · 1 update
- resolved Aug 25, 2025, 07:02 PM UTC
We have identified an issue with our Google Directory Sync process that resulted in unintended deletions of Mio-provisioned Microsoft Guest Accounts. This caused service interruptions for a number of Mio organizations. We have paused the process and are deploying a fix today to prevent further impact. Restoration is underway, which will involve recreating Microsoft Guest Accounts and reinstating channel memberships. Direct Messages with the original accounts and prior file access permissions will no longer work, but history and search remain unaffected. Users will need to re-establish new DMs once guest accounts are recreated. We are working urgently to restore service and will provide updates as progress is made.
Outbound Message Latency
Timeline · 1 update
- resolved Aug 13, 2025, 05:13 PM UTC
Between 07:40 UTC and 15:30 UTC, the Mio platform experienced increased outbound message delivery latency. Inbound delivery was unaffected, and all outbound messages were successfully processed after temporary queuing. The issue has been resolved, and we continue to monitor closely.
Degraded Microsoft API
Timeline · 6 updates
- investigating Apr 17, 2025, 04:22 PM UTC
A Microsoft API that Mio uses to post messages from Google users into Microsoft Teams channels, DMs, and group chats is intermittently unavailable. This is resulting in a failure to deliver messages from some users in Google Chat to their cross platform colleagues in Microsoft Teams. We are working to remediate this partial outage as soon as possible and will post updates as they come. Thanks, Mio Support Team
- investigating Apr 17, 2025, 07:22 PM UTC
We are continuing to investigate this issue.
- investigating Apr 17, 2025, 07:24 PM UTC
Mio has made internal changes to improve the message delivery success rate, however, there are still some message failures. Mio is still working with Microsoft to resolve the API issues.Thank you for your patience. Thanks, Mio Support Team
- investigating Apr 21, 2025, 11:59 AM UTC
Following a rollback of changes by Microsoft over the weekend, all systems now appear operational. We will continue to monitor the situation throughout the day but our current delivery metrics indicate this issue is now resolved.
- monitoring Apr 21, 2025, 01:37 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Apr 25, 2025, 06:21 PM UTC
This incident has been resolved.
Mio service outage
Timeline · 1 update
- resolved Jan 31, 2025, 04:03 PM UTC
There was a Mio service outage for approximately 45 minutes due to general infrastructure issues. Mio is now fully back up and operational. We apologize for any inconvenience during the outage and we appreciate your patience.
Microsoft API Outage
Timeline · 2 updates
- monitoring Dec 12, 2024, 05:13 PM UTC
Mio is experiencing a temporary disruption affecting some features of our chat interoperability service. The disruption is caused by an outage of a Microsoft API: https://admin.microsoft.com/#/servicehealth/:/alerts/TM955389 Our team is actively monitoring the situation and working with Microsoft to restore full functionality as quickly as possible. What you can expect: - The outage impacts messages sent in direct messages and group chats from Microsoft Teams users to Google Chat users. - Until the API is back online Mio recommends end users move all critical conversations to channels as they are unaffected. We understand that this disruption may be inconvenient, and we sincerely apologize for any impact it may cause. We will keep you updated on the progress and notify you as soon as the issue is resolved. Thank you for your patience and understanding. Sincerely, The Mio Support Team
- resolved Dec 13, 2024, 12:54 AM UTC
We're pleased to inform you that the Mio service disruption has been resolved. The Microsoft API issue causing the disruption has been resolved, and full functionality has been restored to Mio. All messages sent from a Microsoft Teams users in a direct message or a group chat to a Google Chat user will be successfully relayed. We understand that this outage caused inconvenience, and we apologize for any impact to your work. We appreciate your patience and understanding while we worked to resolve the issue. We value your business and are committed to providing you with a reliable and seamless experience. If you have any questions or concerns, please don't hesitate to contact our support team at [email protected]. Sincerely, The Mio Support Team