This article provides details on how to proceed when experiencing issues sending emails from Microsoft Outlook versions 2016 and 2019 with Kerio Connect version 9.2.9.
Microsoft Outlook v2016 & 2019
Kerio Control v9.2.9
For end-users using Microsoft Outlook 2019 (1903 - 11425.20228), and the most recent Outlook 2016, the KOFF profile may not work. Microsoft Outlook 2019 is not fully supported by Kerio Connect version 9.2.9, and the full support was introduced in the 9.2.10 release.
The Event Viewer application can display the below message:
Event ID: <> Security warning loading KOFXP.DLL. This MAPI provider DLL might be harmful to your system. You should only load DLLs from trusted providers that have been registered in MapiSvc.Inf. This provider DLL has been blocked and its functionality is no longer available.
For unknown reasons, recent Outlook versions do not support entries in
C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\SYSTEM\MSMAPI\1033\mapisvc.inf, and it always rejects it, even if the path to providers in the mapisvc.inf file is updated to point to well-known MAPI providers search paths:
C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\SYSTEM\MSMAPI\1033
C:\Program Files\Common Files\SYSTEM\MSMAPI\
For the moment, there is a valid workaround possible for your consideration: add/modify the following entries in the Windows Registry Editor v5.00:
Refer to the Process section of this article to implement the workaround described above.
Click the magnifying glass icon and type
Hit the Enter key and click Yes to allow modifications when asked to.
Navigate the tree view on the left-hand side to either of the below keys:
Create or modify the below entries in the registry.
KOFXP.DLLkey should be null.
For more information about the above solution, refer to How to allow MAPI to load unregistered Provider DLLs.
The error message is no longer displayed in the Event Viewer, and you can now send emails in Outlook versions 2016 and 2019.