MailKit.Security.AuthenticationException: Authentication failed at MailKit.Net.Imap.ImapClient.Authenticate
in the logs whenever i try and sync mail..i have tried the IMAP settings elsewhere and they are working ok.. I've read elsewhere this is and issue with MailKit/NTLM and Exchange but obviously I can't start re-writing your binaries. I've also delegated permissions for the Farm account to the mailbox
Love the application and keen to buy but no working with exchange is a deal breaker.
Could you please try to configure Outlook to using the same IMAP settings (the same mail server and the same user account and password) and let us know about the results?