Background: We are running SmarterMail Version - 15.7.6915 on Windows server.

Issue: Client using Outlook 2019 (part of office 365 subscription)

Client is reporting: I can't delete any mail in the inbox. If I delete a mail I see a copy of the mail in Deleted Items, but the mail remains in the Inbox.

I have searched the community threads and saw a similar thread about Outlook 2016. 

  have checked release notes related to version 15, and does not see any fix about this issue. Thanks