Redemption.RDOSession - 8000ffff Catastrophic failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))


Using redemption, receiving the following exception when trying using Redemption.RDOSession on Windows Server 2019:

failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))

Looking for help debugging/troubleshooting.

Have tried both x86 and x64 of Outlook. Have tried using powershell as well as c# and receive the same error. Everything worked fine on Windows Server 1803. I've confirmed that BOTH the x86 and x64 of the redemption libraries are registered. I've checked that the dlls on the 2019 server match the dlls registered on the 1803 server. I've confirmed the same windows features are installed on both systems.

Example powershell to reproduce the issue:

[Reflection.Assembly]::LoadFrom("c:\Redemption\Interop.Redemption.dll") | Out-Null

$rDOSession = New-Object -ComObject "Redemption.RDOSession"
asked on Stack Overflow Oct 14, 2019 by user12215039

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