My specific case is that I want to represent NULL with an explicit string value. If a non-null value evaluates to the NULL string value, then prepend the NULL string value. Then when loading the CSV file back if the value read is the NULL string value then insert a NULL into the database. If the value read starts with NULL string value, then remove it and insert into the database. So it's both an export and import. At this point opencsv doesn't do it's own import, so I suspect this isn't something...
I did some more work on this and realized that the solution I need is likely more specialized than would make sense to add to the library. I believe I can handle this by writing a custom ResultSetHelper class.
Patch to support modifying the default value of ResultSetHelperService
For authentication they have a command line program that does it by redirecting the user to the OWA web page and then the tool captures the appropriate authentication bits. https://github.com/virtuald/ews-proxy/blob/master/cmd/ews-proxy/main.go#L43 It may be possible for DavMail to pretend to be a web browser and fill in the form.
There's an example of converting this JSON/REST data to EWS and it seems to be rendering full MIME message content. https://github.com/virtuald/ews-proxy
VOTE: avidemux
I have since discovered that OWA uses a JSON API, so one could implement this. It may even be possible to convert between the JSON API for OWA and the SOAP API EWS. https://msdn.microsoft.com/en-us/library/office/dn776319(v=exchg.150).aspx
OWA without Webdav
I found the implementation while creating a new patch. Close the ticket.
Track line numbers
Check for null default on HSQL incorrectly flags columns