Once setup an akonadi ews plugin directory, and successfully connected, the directory doesn't appear in Kmail UI. So, we are unable to use mail from an Exchange server. Same behaviours occur with other kontact components: address book and agenda at least
Possibly a duplicate of bug 390798 ? *** This bug has been marked as a duplicate of bug 390798 ***
Not a duplicate IMHO, I managed to work around the referenced bug using the manual settings from https://github.com/KrissN/akonadi-ews/issues/48, but it still does not show up in the folder list in KMail.