Remote Desktop Connection Manager on server with Duo - "Ordinal not found"


We installed Microsoft’s Remote Desktop Connection Manager on a terminal server with Duo authentication installed so we can RDP into other servers from that box. Everything worked great until we rebooted the server, and now every time we try to make an RDP connection to another server using RDCMan, we get this error message multiple times:

“The ordinal 379 could not be located in the dynamic link library C:\Program Files\Duo Security\WindowsLogon\DuoCredProv.dll”

If you click through the multiple warnings RDCMan connects to the remote server,

Anyone seen this before? Any way to resolve it?



Hi Texx,

This is a known issue and are reviewing priority for a fix.

Can you let me know what version of Winlogon and Windows are you running?



Thanks Patrick, at least it’s a known issue.

We’re on Windows version 2012R2, and Winologin 3.1.1


We are experiencing the same issue. Windows Server 2016 (build 1607) and


We’re about to update to Server 2016, so thanks for confirming the issue is still present. Let’s hope Duo can get this resolved in the next release.


This fix is not slated for release in our next update. We’re investigating it for the following release however.


Just want to add that I have same issue, though ordinal # in my error is 381. Duo was just installed on my laptop. I am using RDCMan on Windows 10 v1709 with Windows updates through 3/30/2018. I use RDCMan to connect to Windows Server 2008 R2 through 2016.


Our error is 379 for the ordinal. Windows Server 2012 rds host protected by DUO using an RDG file to jump to other servers (Very common for AWS.)

We get this error when opening Remote Desktop Connection Manager via the RDG file. We do NOT get the error if we open Remote Desktop Connection Manager and THEN open the RDG file.


Same issue using rdc manager on Windows server 2016 . Ordinal 381 could not be located …DuoCredProv.dll


Any update on a targeted fix for this. This is a large problem for our entire IT staff.