Apple calendar sync issues

Communication with Apple calendars appears to have returned to normal operation, albeit with a slightly higher latency than usual.

We will continue to monitor but expect the next update to be the resolution of this incident.

We are now polling Apple calendars every 5 minutes once more. Errors are close to, but slightly above, normal levels.

We are continuing to monitor.

We have reduced the polling frequency for Apple calendars to minimize impact on other services whilst monitoring if the issue has been resolved. Polling every 20 minutes rather than every 5 minutes.

Signs are that we are able to communicate with Apple calendars successfully once again, with errors returning to normal levels.

We are continuing to monitor for a while before increasing polling frequency back to 5 minute intervals.

We have isolated the Apple processing from the rest of the calendar providers and scaled up our infrastructure to maximize total capacity.

Apple synchronization is still heavily impacted by this issue but other processing should no longer be affected.

There seems to be widespread issues for anyone trying to reach Apple's servers, not just Cronofy.

We're working to minimize the side effects on the synchronization of other calendar services.

We are seeing a high rate of errors when communicating with Apple calendars.