I am using evolution with evolution-ews for interaction with a work
email server. The version is 3.28.5-0ubuntu0.18.04.2.
Reasonably regularly I see the following error pop-up. The error does
not appear to cause any fatal problem (though is irritating), so I'm
wondering if the cause is known (and possibly fixed in a more recent
Failed to refresh folder “<Account> : <Folder>”.
The reported error was “Connection terminated unexpectedly”.
The error usually appears after a period of inactivity in the EWS
account and then switching to it.
Here is an example of the exchange seen in the EWS_DEBUG output.