All Systems Operational
Scheduler Operational
90 days ago
99.98 % uptime
Today
API Operational
90 days ago
99.98 % uptime
Today
Background Processing Operational
90 days ago
99.98 % uptime
Today
Developer Dashboard Operational
90 days ago
99.98 % uptime
Today
Major Calendar Providers Operational
Apple Operational
Google Operational
Microsoft 365 Operational
Outlook.com Operational
Conferencing Services Operational
GoTo Operational
Zoom Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Major outage
Partial outage
No downtime recorded on this day.
No data exists for this day.
had a major outage.
had a partial outage.
Scheduled Maintenance
In February, Microsoft are disabling support for ApplicationImpersonation within Microsoft 365 environments.
This will prevent us successfully synchronizing calendars within M365 domains connected using Enterprise Connect via Exchange Web Services.

A migration path to Microsoft’s Graph API protocol is ready for affected domains to take, which can be initiated by following the steps documented here. Domains that will be affected have already received email notifications to the contact emails we have on file for their service accounts, and integrators with affected customer domains have also been notified directly.

From February onwards, we will be unable to continue supporting the Exchange Web Services protocol for Enterprise Connect for Microsoft 365 hosted calendars, and any calendars for domains not following the migration path will have their sync disrupted.

We do not anticipate any issues across the platform in general at this time, nor are any of the following use cases affected:
- Calendars syncing via Individual Connect or Business Connect
- Calendars hosted in on-premise environments
- Free-busy only connections
- Any calendars already connected via Microsoft Graph

For any questions or concerns about this, please contact support@cronofy.com

Posted on Jan 21, 2025 - 14:02 UTC
Past Incidents
Feb 7, 2025

No incidents reported today.

Feb 6, 2025

No incidents reported.

Feb 5, 2025

No incidents reported.

Feb 4, 2025

No incidents reported.

Feb 3, 2025

No incidents reported.

Feb 2, 2025
Completed - The scheduled maintenance has been completed successfully. We observed disruption at the following times (UTC):

Singapore: 07:03:00 - 07:03:15
Australia: 07:14:15 - 07:15:00
UK: 07:23:30 - 07:25:15
Canada: 07:34:45 - 07:36:45
Germany: 07:42:45 - 07:46:00
US: 08:00:45 - 08:01:15

If you have any questions, please email support@cronofy.com.

Feb 2, 08:20 UTC
Verifying - The update is complete in our US data center. We observed disruption from 08:00:45 to 08:01:15 UTC.
Feb 2, 08:10 UTC
Update - The update is complete in our Germany data center. We observed disruption from 07:42:45 to 07:46:00 UTC.

We are beginning the update in our US data center.

Feb 2, 07:50 UTC
Update - The update is complete in our Canada data center. We observed disruption from 07:34:45 to 07:36:45 UTC.

We are beginning the update in our Germany data center.

Feb 2, 07:39 UTC
Update - The update is complete in our UK data center. We observed disruption from 07:23:30 to 07:25:15 UTC.

We are beginning the update in our Canada data center.

Feb 2, 07:30 UTC
Update - The update is complete in our Australia data center. We observed disruption from 07:14:15 to 07:15:00 UTC.

We are beginning the update in our UK data center.

Feb 2, 07:20 UTC
Update - The update is complete in our Singapore data center. We observed disruption from 07:03:00 to 07:03:15 UTC.

We are beginning the update in our Australia data center.

Feb 2, 07:11 UTC
In progress - The scheduled maintenance is in progress. We are beginning the update in our Singapore data center.
Feb 2, 07:00 UTC
Scheduled - We will be performing minor PostgreSQL database engine upgrades in our Aurora clusters across all data centers.

Minor database engine upgrades require a reboot of the database server, therefore there will be up to two minutes of disruption when this happens. We will upgrade each data center one at a time and will begin the first upgrade shortly after 07:00 UTC and expect the upgrades to be completed by 09:00 UTC on Sunday, 2nd February 2025.

We will provide notifications as this maintenance progresses via our status page.

If you have any questions, please email support@cronofy.com.

Jan 24, 15:04 UTC
Feb 1, 2025

No incidents reported.

Jan 31, 2025

No incidents reported.

Jan 30, 2025

No incidents reported.

Jan 29, 2025
Postmortem - Read details
Feb 3, 18:28 UTC
Resolved - Normal operation has resumed and been consistent for the last 30 minutes, so this incident is resolved.

About 1.75% of API calls between 10:08 and 10:38 received a HTTP 500 response due to database connections being refused.

A combination of high-load tasks, both from API calls and internal DB processes, all happened at once. This caused the database to degrade in performance and refuse some connections. Attempts to manually kill some of the processes did not succeed, for reasons we will investigate.

Once these jobs completed, performance recovered and normal operation resumed. Jobs which had failed and retried have since completed.

Jan 29, 11:51 UTC
Monitoring - Database load is back to normal and error have ceased. We are continuing to monitor to ensure normal operation has resumed.
Jan 29, 11:17 UTC
Identified - We are still seeing occasional errors via the API. These are in much less common and in smaller numbers, but not back to zero yet.
The underlying cause is above average load on our database, which we are working to resolve.

Jan 29, 11:03 UTC
Monitoring - Error rates have returned to normal; we are continuing to monitor.
Jan 29, 10:38 UTC
Investigating - We're investigating an increase in API calls resulting in HTTP 500 errors
Jan 29, 10:32 UTC
Jan 28, 2025

No incidents reported.

Jan 27, 2025

No incidents reported.

Jan 26, 2025

No incidents reported.

Jan 25, 2025

No incidents reported.

Jan 24, 2025

No incidents reported.