A maintenance window has been scheduled for our .US calendar servers, on 03, 26, 2018 from 08:00 to 10:00 CET.
We will be migrating the second batch of .US customers from our European calendar-pod to the .US based calendar-pod.
In this second batch ~21.000 customers will be migrated. The affected .US customers (currently residing in our caldav3 instance) will not be able access their calendars in the service window.
Once the migration is complete our .US based customers should see improved response times in the calendar.
If you experience any further trouble after the maintenance window has completed, please contact our chat support One.com/chat or write us at firstname.lastname@example.org