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Home » GFI User Forums » Kerio Connect » Looks like Outlook is going to block Kerio DLLs
Looks like Outlook is going to block Kerio DLLs [message #144445] Fri, 16 November 2018 21:55 Go to next message
wag357 is currently offline  wag357
Messages: 53
Registered: August 2004
I found this entry in my Win10 workstations with Office365:
This is EventID 68 in the Application Log:

Security warning loading KOFSTR.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 will be blocked in a future Outlook client update and its functionality will no longer be available. For more information about registering provider DLLs, see https://go.microsoft.com/fwlink/?linkid=2009861&clcid=0x 409.

There is an identical entry calling out KOFXP.DLL right under it.

This is a better link to the MS tech doc.

I found MapiSvc.inf in this location:
C:\Users\UserName\AppData\Local\Microsoft\Outlook
and I see a bunch of Kerio entries in it so I'm not sure why the OS thinks the DLLs are not registered in this .inf file.

I wanted to put this out there.

[Updated on: Fri, 16 November 2018 21:58]

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Re: Looks like Outlook is going to block Kerio DLLs [message #144862 is a reply to message #144445] Mon, 21 January 2019 16:10 Go to previous messageGo to next message
FloFMS is currently offline  FloFMS
Messages: 8
Registered: November 2011
I have the same issue.
My Outlook Crashed on Terminal Server with this Error Log.
Does anyone have a solution to the problem?
I have already reinstalled the Outlook Connector once.

Regards Florian

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Re: Looks like Outlook is going to block Kerio DLLs [message #144889 is a reply to message #144862] Thu, 24 January 2019 21:11 Go to previous messageGo to next message
Bud Durland is currently offline  Bud Durland
Messages: 588
Registered: December 2013
Location: Plattsburgh, NY
What version of Kerio Connect?

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Re: Looks like Outlook is going to block Kerio DLLs [message #144890 is a reply to message #144445] Fri, 25 January 2019 08:41 Go to previous messageGo to next message
hromji is currently offline  hromji
Messages: 10
Registered: February 2015
I have the same issue with users using Outlook 2016... (Server runs Kerio Connect 9.0.0)

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Re: Looks like Outlook is going to block Kerio DLLs [message #144896 is a reply to message #144445] Sat, 26 January 2019 17:12 Go to previous messageGo to next message
mwgbr is currently offline  mwgbr
Messages: 61
Registered: June 2012
Same problem here with Kerio 9.2.8 and KOFF 9.2.8 under Office 2016, 2019 and Office 365 installations.
Here it is only the file KOFXP.dll (screenshot attached).

[Updated on: Sat, 26 January 2019 17:13]

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Re: Looks like Outlook is going to block Kerio DLLs [message #145561 is a reply to message #144896] Tue, 16 April 2019 15:55 Go to previous messageGo to next message
hromji is currently offline  hromji
Messages: 10
Registered: February 2015
Any updates regarding this issue?
Thanks

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Re: Looks like Outlook is going to block Kerio DLLs [message #145582 is a reply to message #145561] Thu, 18 April 2019 12:16 Go to previous messageGo to next message
mwgbr is currently offline  mwgbr
Messages: 61
Registered: June 2012
Like in this post: https:// forums.gfi.com/index.php?t=msg&th=37335&start=0&

Outgoing messages did not work anymore since today and the update 1904 of Office 365 on windows.

To save you some time and before trying to downgrade to an older version (which is not comfortable with 365), here is the solution:

https:// support.microsoft.com/en-sg/help/4498413/how-to-enable-mapi- to-load-unregistered-provider-dlls

And specifically for Kerio:

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\O utlook\Security\TrustedProviders]
"KOFXP.DLL"=""

Feel free to push this with GPO. And please remove the space between O and utlook.

[Updated on: Thu, 18 April 2019 12:24]

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Re: Looks like Outlook is going to block Kerio DLLs [message #145588 is a reply to message #145582] Thu, 18 April 2019 18:27 Go to previous messageGo to next message
rigo is currently offline  rigo
Messages: 51
Registered: May 2008
With help from all smart people above, here is registry key fix to Outlook not being able to send because of update 1904
Again thanks all those with higher pay grades Wink

https://tinyurl.com/y425zpz9

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Re: Looks like Outlook is going to block Kerio DLLs [message #145712 is a reply to message #145588] Mon, 06 May 2019 01:37 Go to previous messageGo to next message
sandyj is currently offline  sandyj
Messages: 5
Registered: March 2011
Location: NZ
This fix does not seem to work for us running outlook 2016 and 2019 with the latest updates for the server and client
We have Security warning loading KOFSTR.DLL and KOFXP.DLL in the windows 10 event logs.
Running kerio server 9.2.9 p1
We currently have two PCS doing this with outlook crashing every day only.

Here is a copy of one of the messages in the event log
Security warning loading KOFSTR.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.

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Re: Looks like Outlook is going to block Kerio DLLs [message #145715 is a reply to message #145588] Mon, 06 May 2019 13:08 Go to previous messageGo to next message
han_swurst is currently offline  han_swurst
Messages: 11
Registered: February 2019
Location: Germany
Hello,
has anyone, who had the Problem with sending mails after update 1604, checked if the entry in the eventviewer still exist after adding the registry key?
Because my Installation of Office 2016 Home and Business is now on 1604 and i still can send email with Outlook, no Errors.
But i have an entry in the eventviewer that KOFXP.dll is blocked and the functions of this dll are not usable. I applied the registry key but the entry still Comes up.
[img]/index.php?t=getfile&id=4964&private=0[/img]
best regards
Chris
  • Attachment: error.PNG
    (Size: 36.24KB, Downloaded 658 times)

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Re: Looks like Outlook is going to block Kerio DLLs [message #145797 is a reply to message #145715] Thu, 16 May 2019 00:02 Go to previous messageGo to next message
WeHoDo is currently offline  WeHoDo
Messages: 12
Registered: August 2018
I have same problem on clients.
Is the Kerio Connect Connector a must have on the computers?
Isnt it possible to make Outlook directly work via Exchange without the connector?

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Re: Looks like Outlook is going to block Kerio DLLs [message #146821 is a reply to message #145797] Tue, 15 October 2019 16:00 Go to previous messageGo to next message
derek_500 is currently offline  derek_500
Messages: 38
Registered: September 2006
Location: MA, USA
For anyone else looking into this issue, it appears to be resolved for Kerio Connect 9.2.10.
editing to add - because we were upgrading from Office 2010 to 365/2019 at the same time, we had to do a full uninstall of the offline connector, reboot, then reinstall the offline connector to resolve the problem.

[Updated on: Wed, 16 October 2019 19:31]

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Re: Looks like Outlook is going to block Kerio DLLs [message #146850 is a reply to message #146821] Thu, 17 October 2019 14:29 Go to previous messageGo to next message
Howard
Messages: 12
Registered: March 2019
We are running both 9.2.10 (build 4692) on both the mail server and the KOFF Connector. We are still seeing this issue so I don't think its been resolved as yet.

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Re: Looks like Outlook is going to block Kerio DLLs [message #146893 is a reply to message #146850] Thu, 24 October 2019 01:58 Go to previous messageGo to next message
bigmountain is currently offline  bigmountain
Messages: 65
Registered: April 2006
This issue was resolved in 9.2.10 as far as I can tell. However, if any of you are still experiencing this, double check to see if you are running any desktop antivirus software apps. Perhaps it is blocking your outbound mail? It has been known to happen in the past.

Preferred Kerio Partner and Cloud Solutions Provider - Offering both shared and dedicated Kerio Connect hosting solutions.
Visit us at http://bigmountainmail.com

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Re: Looks like Outlook is going to block Kerio DLLs [message #146897 is a reply to message #146893] Thu, 24 October 2019 13:40 Go to previous messageGo to previous message
ian.bugeja is currently offline  ian.bugeja
Messages: 666
Registered: March 2017
Location: Malta
The official statement is that this issue should be resolved.

Part of 9.2.10 we are automatically performing the steps in this KB
https://support.gfi.com/hc/en-us/articles/360008700140-Error -This-MAPI-provider-DLL-might-be-harmful-to-your-system-When -Sending-Emails-in-Outlook-Versions-2016-2019-with-Kerio-Con nect-Version-9-2-9

However, we have now seen in latest version of Outlook (v1909 - released October 2019) that it is crashing if KOFF is installed. We are still investigating this issue. What is weird is that at this time Insider builds of Microsoft Outlook work with no issue, meaning this could be an Outlook issue that has been fixed in future builds of Outlook.

Ian Bugeja
GFI Software

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