We set the Notes Client as our default mail application. When we share a file (right-click the file from the desktop), the Notes Client is not listed even if it checked in Extensions in Mac.
We also tried to share a file from MS Apps and other Text Editors but it just open the Notes Client and create new document but it did not attach the file we are trying to share.
If we do this function in Windows, we just get bunch of errors with "Cannot locate field definition for Field..."
According to your Extended Team, this feature is not yet implemented.