Recently, Microsoft changed the response they send after deleting an event in a way incompatible with ChronoLink. Since then, connections failed whenever they had to delete an event (for example, when an event had been deleted from the source calendar).
This has now been fixed. Affected connections will resume within 24 hours.
Building on the improvements to the retry mechanism from the February 5 update, we have now shortened the minimum retry delay from 24 hours to one hour. The maximum retry delay was likewise lowered from 30 hours to 4.