Dear AMD Community,
with a brand new Windows 10 System with a Ryzen CPU it was not possible to use a digital signature with Outlook 2016/2019. The Problem is described in detail here: Signatur mit S/Mime-Zertifikat in Outlook 2016 schlägt fehl - Microsoft Community
Microsoft found the issue in cooperation with the users which have the issue. Solution is to delete the [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Cryptography\Providers\AMD Provider] key in the registry.
Reason for that is the missing amdumcsp.dll which should be located in C:\Windows\system32.
Can someone from the AMD Stuff confirm this and provide the amdumcsp.dll for Windows 10? Just with this DLL S/MIME will work on Windows 10 with Ryzen CPU / AMD Chipset out of the box.
Thank you very much